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 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

Three smiley faces are situated along the x axis as follows: m1 = 5 kg at 3.0 m,m2 = 3 kg at 6.0 m and m3 = 2 kg at 8.0 m.Where is the center of mass situated?

A) 3.9 m B) 4.9 m C) 5.5 m D) 4.1 m E) 5.1 m A) 3.9 m B) 4.9 m C) 5.5 m D) 4.1 m E) 5.1 m

Exam 5: Applications of Newtons Laws

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 41

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 42

As a sky diver falls through the air,her terminal speed

(Multiple Choice)

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Question 43

If a jet plane doubles the speed,the drag force on the jet plane

(Multiple Choice)

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Question 44

A horizontal force acts on a mass m that lies on a horizontal surface.The acceleration of m is .The coefficient of kinetic friction µ_k between mass m and the surface can be calculated from

(Multiple Choice)

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Question 45

Three smiley faces are situated along the x axis as follows: m₁ = 5 kg at 3.0 m,m₂ = 3 kg at 6.0 m and m₃ = 2 kg at 8.0 m.Where is the center of mass situated?

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Question 46

A tired worker pushes a heavy (100-kg)crate that is resting on a thick pile carpet.The coefficients of static and kinetic friction are 0.6 and 0.4,respectively.The worker pushes with a force of 500 N.The frictional force exerted by the surface is

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Question 47

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?

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Question 48

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

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Question 49

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

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Question 50

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 0.50 (static)and 0.30 (kinetic).On top of m is a second box M of mass 20 kg.The coefficients of friction between the boxes m and M are 0.80 (static)and 0.60 (kinetic).How much weight needs to be added to the hook until the box just begins to move.

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Question 51

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 52

A 100-kg block is pushed up a 30º incline that is 10 m long.If the coefficient of friction between the block and the incline is 0.1,the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 s is approximately

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Question 53

A heavy truck and a light car are traveling at the same speed on the same roadway.If the coefficients of static friction between their tires and the road are the same,which vehicle will be able to stop in the shortest distance? Assume both have the same braking force.

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Question 54

A mass m is placed on a rough incline at an angle $\theta$ to the horizon.A force F is applied up the incline,to prevent the mass from sliding down the incline,and it is just enough to prevent the mass from sliding down the incline.Using the compass rose,the direction of the frictional force is along $A mass m is placed on a rough incline at an angle \theta to the horizon.A force F is applied up the incline,to prevent the mass from sliding down the incline,and it is just enough to prevent the mass from sliding down the incline.Using the compass rose,the direction of the frictional force is along$

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Question 55

Three particles having a total mass of 6 kg are subjected to three forces,as shown in the figure.The magnitude of one force is presented to furnish the scale factor for the others.What is the acceleration of the center of mass of the system?

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Question 56

A block of mass m is at rest on an inclined plane that makes an angle of 30º with the horizontal,as shown in the figure.Which of the following statements about the force of static friction is true?

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Question 57

The net force acting on an object is zero.You can therefore definitely conclude that the object is

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Question 58

The shaded area in the figure represents a uniformly thick sheet of metal.The center of mass of the sheet is closest to point

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Question 59

The figure shows a top view of a ball on the end of a string traveling counterclockwise in a circular path.Assume that air resistance is negligible.The free-body diagram that best represents the acceleration of the ball is

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Question 60

Showing 41 - 60 of 73

Exam 5: Applications of Newtons Laws

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 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?

As a sky diver falls through the air,her terminal speed

If a jet plane doubles the speed,the drag force on the jet plane

A horizontal force acts on a mass m that lies on a horizontal surface.The acceleration of m is .The coefficient of kinetic friction µk between mass m and the surface can be calculated from

Three smiley faces are situated along the x axis as follows: m1 = 5 kg at 3.0 m,m2 = 3 kg at 6.0 m and m3 = 2 kg at 8.0 m.Where is the center of mass situated?

A tired worker pushes a heavy (100-kg)crate that is resting on a thick pile carpet.The coefficients of static and kinetic friction are 0.6 and 0.4,respectively.The worker pushes with a force of 500 N.The frictional force exerted by the surface is

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?

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

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 100-kg block is pushed up a 30º incline that is 10 m long.If the coefficient of friction between the block and the incline is 0.1,the constant force parallel to the incline that is required to move the block from rest at the bottom of the incline to the top in 3 s is approximately

A heavy truck and a light car are traveling at the same speed on the same roadway.If the coefficients of static friction between their tires and the road are the same,which vehicle will be able to stop in the shortest distance? Assume both have the same braking force.

Three particles having a total mass of 6 kg are subjected to three forces,as shown in the figure.The magnitude of one force is presented to furnish the scale factor for the others.What is the acceleration of the center of mass of the system?

A block of mass m is at rest on an inclined plane that makes an angle of 30º with the horizontal,as shown in the figure.Which of the following statements about the force of static friction is true?

The net force acting on an object is zero.You can therefore definitely conclude that the object is

The shaded area in the figure represents a uniformly thick sheet of metal.The center of mass of the sheet is closest to point

The figure shows a top view of a ball on the end of a string traveling counterclockwise in a circular path.Assume that air resistance is negligible.The free-body diagram that best represents the acceleration of the ball is

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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 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 horizontal force acts on a mass m that lies on a horizontal surface.The acceleration of m is .The coefficient of kinetic friction µ_k between mass m and the surface can be calculated from

Three smiley faces are situated along the x axis as follows: m₁ = 5 kg at 3.0 m,m₂ = 3 kg at 6.0 m and m₃ = 2 kg at 8.0 m.Where is the center of mass situated?

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?