In the figure, m1 = 3 kg, m2 = 8 kg, and M3 = 4 kg. The forces are 1 = 1 N + 1 N , 2 = 1 N + 1 N , and 3 = -2 N . The acceleration of the center of mass is approximately

A) 0.13 m/s2 B) 0.13 m/s2 at an angle of 45º with the x axis C) 0.13 m/s2 D) 0.27 m/s2 at an angle of 45º with the x axis E) 0.27 m/s2 A) 0.13 m/s2 B) 0.13 m/s2 at an angle of 45º with the x axis C) 0.13 m/s2 D) 0.27 m/s2 at an angle of 45º with the x axis E) 0.27 m/s2

Four smiley faces are situated along the x axis as follows: m1 = 5 kg at - 5.0 m, m2 = 3 kg at - 2.0 m, m3 = 3 kg at 1.0 m, and m4 = 2 kg at 3.0 m. Where is the center of mass situated?

A) 3.1 m B) 0.0 m C) - 1.7 m D) - 0.80 m E) - 3.1 m A) 3.1 m B) 0.0 m C) - 1.7 m D) - 0.80 m E) - 3.1 m

Use the figure below for the problem. A mass, mS1U1B11S1U1B0, attached to a spring is placed on a cart with mass mS1U1B12S1U1B0, which moves freely and without friction on a table. mS1U1B11S1U1B0 slides without friction on the cart and is ¼ the mass of mS1U1B12S1U1B0. -When m1 is allowed to oscillate along m2, what is the motion of m2?

A) m2 does not move B) m2 moves in the same direction as m1 C) m2 moves in the opposite direction of m1 D) Depends on the spring constant E) None of the above A) m2 does not move B) m2 moves in the same direction as m1 C) m2 moves in the opposite direction of m1 D) Depends on the spring constant E) None of the above

Four smiley faces are situated along the x axis as follows: m1 = 5 kg at 0.0 m, m2 = 3 kg at 4.0 m, m3 = 3 kg at x m, and m4 = 2 kg at 8.0 m. If the center of mass is situated at 3.54 m, where is m3 located?

A) 3.5 m B) 7.0 m C) 6.0 m D) 4.0 m E) 5.0 m A) 3.5 m B) 7.0 m C) 6.0 m D) 4.0 m E) 5.0 m

A car of mass 3.0 $\times$ 103 kg traveling at a speed of 20 is passing a truck of mass 7.5 $\times$ 103 kg traveling at a speed of 16 in the same direction. What is the speed of the center of mass of this system?

A) 16 B) 17 C) 18 D) 19 E) 20 A) 16 B) 17 C) 18 D) 19 E) 20

Exam 5: Applications of Newtons Laws

The picture on the right shows an exploding firework high up in the air, just after the firework has come to a rest. Which point best describe the center of mass of the explosion? Picture by H.K. Ng

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Question 21

Four identical blocks are moving on a surface for which the coefficient of kinetic friction between each block and the surface is µ_k. The velocity of each block is indicated by the vector on the block. For which block is the force of friction between the surface and the block greatest?

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Question 22

A block with a mass of 10 kg is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.30, and the coefficient of kinetic friction is 0.25. A force of 20 N acts on the block toward the left. The magnitude of the frictional force on the block is

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Question 23

A 50-kg block rests on a horizontal surface. The coefficient of static friction $\mu$ _a = 0.50. The coefficient of kinetic friction $\mu$ _k = 0.35. A force $A 50-kg block rests on a horizontal surface. The coefficient of static friction \mu a = 0.50. The coefficient of kinetic friction \mu k = 0.35. A force of 250 N is applied as shown.$ of 250 N is applied as shown. $A 50-kg block rests on a horizontal surface. The coefficient of static friction \mu a = 0.50. The coefficient of kinetic friction \mu k = 0.35. A force of 250 N is applied as shown.$

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Question 24

An object traveling in a circle at constant speed

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Question 25

Which of the following statements is NOT true about friction?

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Question 26

In the figure, m₁ = 3 kg, m₂ = 8 kg, and M₃ = 4 kg. The forces are ₁ = 1 N + 1 N , ₂ = 1 N + 1 N , and ₃ = -2 N . The acceleration of the center of mass is approximately

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Question 27

The center of mass of the system of particles shown in the diagram is at point

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Question 28

Four smiley faces are situated along the x axis as follows: m₁ = 5 kg at - 5.0 m, m₂ = 3 kg at - 2.0 m, m₃ = 3 kg at 1.0 m, and m₄ = 2 kg at 3.0 m. Where is the center of mass situated?

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Question 29

A box (M = 20 kg) is sitting on a horizontal surface. It is connected to a massless hook by a light string passing over a massless pulley wheel. The coefficients of friction between the box and the surface are 0.80 (static) and 0.30 (kinetic). If 15 kg (in total) are placed on the hook, calculate the acceleration of the box.

(Multiple Choice)

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Question 30

Use the figure below for the problem. A mass, m₁, attached to a spring is placed on a cart with mass m₂, which moves freely and without friction on a table. m₁ slides without friction on the cart and is ¼ the mass of m₂. -When m₁ is allowed to oscillate along m₂, what is the motion of m₂?

(Multiple Choice)

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Question 31

A proud new Jaguar owner drives her car at a speed of 25 m/s into a corner. The coefficients of friction between the road and the tires are 0.70 (static) and 0.40 (kinetic). What is the minimum radius of curvature for the corner in order for the car not to skid?

(Multiple Choice)

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Question 32

An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30º with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is

(Multiple Choice)

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Question 33

A particle moving with uniform Motion Along a Curved Path has a period of 0.24 s and a speed of 4.2 m/s. The radius of the path of the particle is

(Multiple Choice)

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Question 34

The free-body diagram that best represents the forces acting on the student sliding down a rough incline is

(Multiple Choice)

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Question 35

Four smiley faces are situated along the x axis as follows: m₁ = 5 kg at 0.0 m, m₂ = 3 kg at 4.0 m, m₃ = 3 kg at x m, and m₄ = 2 kg at 8.0 m. If the center of mass is situated at 3.54 m, where is m₃ located?

(Multiple Choice)

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Question 36

A block of mass m is pulled in the direction shown in the figure across a rough surface at a constant velocity. The magnitude of the frictional force is

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Question 37

A uniform horizontal bar is in a region of space where the acceleration due to gravity g varies, increasing from left to right. Where is the location of the center of mass relative to the center of gravity?

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Question 38

A car of mass 3.0 $\times$ 10³ kg traveling at a speed of 20 $A car of mass 3.0 \times 103 kg traveling at a speed of 20 is passing a truck of mass 7.5 \times 103 kg traveling at a speed of 16 in the same direction. What is the speed of the center of mass of this system?$ is passing a truck of mass 7.5 $\times$ 10³ kg traveling at a speed of 16 $A car of mass 3.0 \times 103 kg traveling at a speed of 20 is passing a truck of mass 7.5 \times 103 kg traveling at a speed of 16 in the same direction. What is the speed of the center of mass of this system?$ in the same direction. What is the speed of the center of mass of this system?

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Question 39

An object with a mass M = 250 g is at rest on a plane that makes an angle $\theta$ = 30º above the horizontal. The coefficient of kinetic friction between M and the plane is µ_k = 0.100. Mass M is attached by a string to another mass, M = 200 g, which hangs freely. When mass m has fallen 30.0 cm, its speed is $An object with a mass M = 250 g is at rest on a plane that makes an angle \theta = 30º above the horizontal. The coefficient of kinetic friction between M and the plane is µk = 0.100. Mass M is attached by a string to another mass, M = 200 g, which hangs freely. When mass m has fallen 30.0 cm, its speed is$

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Question 40

Showing 21 - 40 of 75

The picture on the right shows an exploding firework high up in the air, just after the firework has come to a rest. Which point best describe the center of mass of the explosion? Picture by H.K. Ng

Four identical blocks are moving on a surface for which the coefficient of kinetic friction between each block and the surface is µ_k. The velocity of each block is indicated by the vector on the block. For which block is the force of friction between the surface and the block greatest?

A block with a mass of 10 kg is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.30, and the coefficient of kinetic friction is 0.25. A force of 20 N acts on the block toward the left. The magnitude of the frictional force on the block is

An object traveling in a circle at constant speed

Which of the following statements is NOT true about friction?

In the figure, m₁ = 3 kg, m₂ = 8 kg, and M₃ = 4 kg. The forces are ₁ = 1 N + 1 N , ₂ = 1 N + 1 N , and ₃ = -2 N . The acceleration of the center of mass is approximately

The center of mass of the system of particles shown in the diagram is at point

Four smiley faces are situated along the x axis as follows: m₁ = 5 kg at - 5.0 m, m₂ = 3 kg at - 2.0 m, m₃ = 3 kg at 1.0 m, and m₄ = 2 kg at 3.0 m. Where is the center of mass situated?

A proud new Jaguar owner drives her car at a speed of 25 m/s into a corner. The coefficients of friction between the road and the tires are 0.70 (static) and 0.40 (kinetic). What is the minimum radius of curvature for the corner in order for the car not to skid?

An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30º with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is

A particle moving with uniform Motion Along a Curved Path has a period of 0.24 s and a speed of 4.2 m/s. The radius of the path of the particle is

The free-body diagram that best represents the forces acting on the student sliding down a rough incline is

Four smiley faces are situated along the x axis as follows: m₁ = 5 kg at 0.0 m, m₂ = 3 kg at 4.0 m, m₃ = 3 kg at x m, and m₄ = 2 kg at 8.0 m. If the center of mass is situated at 3.54 m, where is m₃ located?

A block of mass m is pulled in the direction shown in the figure across a rough surface at a constant velocity. The magnitude of the frictional force is

A uniform horizontal bar is in a region of space where the acceleration due to gravity g varies, increasing from left to right. Where is the location of the center of mass relative to the center of gravity?

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

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Exam 5: Applications of Newtons Laws

The picture on the right shows an exploding firework high up in the air, just after the firework has come to a rest. Which point best describe the center of mass of the explosion? Picture by H.K. Ng

Four identical blocks are moving on a surface for which the coefficient of kinetic friction between each block and the surface is µk. The velocity of each block is indicated by the vector on the block. For which block is the force of friction between the surface and the block greatest?

A block with a mass of 10 kg is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.30, and the coefficient of kinetic friction is 0.25. A force of 20 N acts on the block toward the left. The magnitude of the frictional force on the block is

A 50-kg block rests on a horizontal surface. The coefficient of static friction μ\muμ a = 0.50. The coefficient of kinetic friction μ\muμ k = 0.35. A force of 250 N is applied as shown.

An object traveling in a circle at constant speed

Which of the following statements is NOT true about friction?

In the figure, m1 = 3 kg, m2 = 8 kg, and M3 = 4 kg. The forces are 1 = 1 N + 1 N , 2 = 1 N + 1 N , and 3 = -2 N . The acceleration of the center of mass is approximately

The center of mass of the system of particles shown in the diagram is at point

Four smiley faces are situated along the x axis as follows: m1 = 5 kg at - 5.0 m, m2 = 3 kg at - 2.0 m, m3 = 3 kg at 1.0 m, and m4 = 2 kg at 3.0 m. Where is the center of mass situated?

Use the figure below for the problem. A mass, m1, attached to a spring is placed on a cart with mass m2, which moves freely and without friction on a table. m1 slides without friction on the cart and is ¼ the mass of m2. -When m1 is allowed to oscillate along m2, what is the motion of m2?

A proud new Jaguar owner drives her car at a speed of 25 m/s into a corner. The coefficients of friction between the road and the tires are 0.70 (static) and 0.40 (kinetic). What is the minimum radius of curvature for the corner in order for the car not to skid?

An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30º with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is

A particle moving with uniform Motion Along a Curved Path has a period of 0.24 s and a speed of 4.2 m/s. The radius of the path of the particle is

The free-body diagram that best represents the forces acting on the student sliding down a rough incline is

Four smiley faces are situated along the x axis as follows: m1 = 5 kg at 0.0 m, m2 = 3 kg at 4.0 m, m3 = 3 kg at x m, and m4 = 2 kg at 8.0 m. If the center of mass is situated at 3.54 m, where is m3 located?

A block of mass m is pulled in the direction shown in the figure across a rough surface at a constant velocity. The magnitude of the frictional force is

A uniform horizontal bar is in a region of space where the acceleration due to gravity g varies, increasing from left to right. Where is the location of the center of mass relative to the center of gravity?

A car of mass 3.0 ×\times× 103 kg traveling at a speed of 20 is passing a truck of mass 7.5 ×\times× 103 kg traveling at a speed of 16 in the same direction. What is the speed of the center of mass of this system?

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

Four identical blocks are moving on a surface for which the coefficient of kinetic friction between each block and the surface is µ_k. The velocity of each block is indicated by the vector on the block. For which block is the force of friction between the surface and the block greatest?

In the figure, m₁ = 3 kg, m₂ = 8 kg, and M₃ = 4 kg. The forces are ₁ = 1 N + 1 N , ₂ = 1 N + 1 N , and ₃ = -2 N . The acceleration of the center of mass is approximately

Four smiley faces are situated along the x axis as follows: m₁ = 5 kg at - 5.0 m, m₂ = 3 kg at - 2.0 m, m₃ = 3 kg at 1.0 m, and m₄ = 2 kg at 3.0 m. Where is the center of mass situated?

Four smiley faces are situated along the x axis as follows: m₁ = 5 kg at 0.0 m, m₂ = 3 kg at 4.0 m, m₃ = 3 kg at x m, and m₄ = 2 kg at 8.0 m. If the center of mass is situated at 3.54 m, where is m₃ located?