The Earth has mass 5.89 $\times$ 1024 kg.The moon has mass 7.36 $\times$ 1022 kg and is 3.84 $\times$ 105 km from Earth.How far from the center of Earth is the center of mass of the Earth-moon system?

A) 4.7 $\times$ 103 km B) 7.4 $\times$ 103 km C) 1.9 $\times$ 105 km D) 2.1 $\times$ 105 km E) 3.8 $\times$ 103 km A) 4.7 $\times$ 103 km B) 7.4 $\times$ 103 km C) 1.9 $\times$ 105 km D) 2.1 $\times$ 105 km E) 3.8 $\times$ 103 km

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

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

Exam 5: Applications of Newtons Laws

A ball of mass m is attached to a thin string and whirled in a vertical circle or radius r.The tension in the string at point e where the ball is moving with speed v is

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Question 1

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A professor likes to demonstrate centripetal force by swinging a bucket of water in the vertical direction.What is the minimum speed he must swing the bucket at the top of the circle if he is not to get drenched? (Assume that his arm is 1 m long.)

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Question 2

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A horizontal force $A horizontal force is used to push an object of mass m up an inclined plane.The angle between the plane and the horizontal is \theta .The normal reaction force of the plane acting on the mass m is$ is used to push an object of mass m up an inclined plane.The angle between the plane and the horizontal is $\theta$ .The normal reaction force of the plane acting on the mass m is

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Question 3

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A block of mass m_b rests on a horizontal surface and is accelerated by means of a horizontal cord that passes over a frictionless peg to a hanging weight of mass m_w.The coefficient of kinetic friction between the block and the horizontal surface is µ and the tension in the cord is T.The acceleration of the block is given by

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Question 4

Which of the following statements is NOT true about friction?

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Question 5

The Earth has mass 5.89 $\times$ 10²⁴ kg.The moon has mass 7.36 $\times$ 10²² kg and is 3.84 $\times$ 10⁵ km from Earth.How far from the center of Earth is the center of mass of the Earth-moon system?

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Question 6

When you accelerate your car,the front of the car lifts up slightly.Or when you brake,the front dips down.The primary reason is because the

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Question 7

A worker pulls horizontally on a rope that is attached to a 10-kg crate resting on a rough floor.The coefficients of static and kinetic friction are 0.5 and 0.3,respectively.The worker pulls with a force of 40 N.The frictional force exerted by the surface is

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Question 8

Which fundamental force(s)gives rise to friction?

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Question 9

A 1.0-kg mass is acted on by a net force of 4.0 N and a 3.0-kg mass is acted on by a net force of 3.0 N,in the directions shown.The acceleration of the center of mass of this system is approximately

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Question 10

The mass of the rectangle in the figure is M,the mass of the ring is M,and the mass of the circle is 3M.The center of mass of the system with respect to the origin O is located at point

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Question 11

Two objects are sliding at the same speed across a wooden surface.The coefficient of kinetic friction between the first object and the surface is twice that between the second object and the surface.The distance traveled by the first object before it stops is S.The distance traveled by the second object is

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Question 12

The system in the figure is moving with constant speed v to the right on a stationary ramp.The system will accelerate to the right if

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Question 13

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N.The coefficient of kinetic friction between the surfaces is 0.3.The force of friction is

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Question 14

A block slides down a frictionless incline.The path at the bottom of the incline is an arc of a circle.The direction of the net force on the block at the bottom of the arc (point P)is along (use the compass rose)

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Question 15

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 16

A 6000-kg truck is accelerating at 0.5 m/s² up a slope of 5 degrees.If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass,calculate the driving force needed for the truck to accelerate up the incline.

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Question 17

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?

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Question 18

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

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Question 19

The figure shows a piece of sheet metal suspended in two positions by a string.From the way the metal hangs,you can see that the center of gravity is nearest point

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Question 20

Showing 1 - 20 of 73

Exam 5: Applications of Newtons Laws

A ball of mass m is attached to a thin string and whirled in a vertical circle or radius r.The tension in the string at point e where the ball is moving with speed v is

A professor likes to demonstrate centripetal force by swinging a bucket of water in the vertical direction.What is the minimum speed he must swing the bucket at the top of the circle if he is not to get drenched? (Assume that his arm is 1 m long.)

A horizontal force is used to push an object of mass m up an inclined plane.The angle between the plane and the horizontal is θ\thetaθ .The normal reaction force of the plane acting on the mass m is

Which of the following statements is NOT true about friction?

The Earth has mass 5.89 ×\times× 1024 kg.The moon has mass 7.36 ×\times× 1022 kg and is 3.84 ×\times× 105 km from Earth.How far from the center of Earth is the center of mass of the Earth-moon system?

When you accelerate your car,the front of the car lifts up slightly.Or when you brake,the front dips down.The primary reason is because the

A worker pulls horizontally on a rope that is attached to a 10-kg crate resting on a rough floor.The coefficients of static and kinetic friction are 0.5 and 0.3,respectively.The worker pulls with a force of 40 N.The frictional force exerted by the surface is

Which fundamental force(s)gives rise to friction?

A 1.0-kg mass is acted on by a net force of 4.0 N and a 3.0-kg mass is acted on by a net force of 3.0 N,in the directions shown.The acceleration of the center of mass of this system is approximately

The mass of the rectangle in the figure is M,the mass of the ring is M,and the mass of the circle is 3M.The center of mass of the system with respect to the origin O is located at point

The system in the figure is moving with constant speed v to the right on a stationary ramp.The system will accelerate to the right if

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N.The coefficient of kinetic friction between the surfaces is 0.3.The force of friction is

A block slides down a frictionless incline.The path at the bottom of the incline is an arc of a circle.The direction of the net force on the block at the bottom of the arc (point P)is along (use the compass rose)

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 6000-kg truck is accelerating at 0.5 m/s2 up a slope of 5 degrees.If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass,calculate the driving force needed for the truck to accelerate up the incline.

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?

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

The figure shows a piece of sheet metal suspended in two positions by a string.From the way the metal hangs,you can see that the center of gravity is nearest point

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The Earth has mass 5.89 $\times$ 10²⁴ kg.The moon has mass 7.36 $\times$ 10²² kg and is 3.84 $\times$ 10⁵ km from Earth.How far from the center of Earth is the center of mass of the Earth-moon system?

A 6000-kg truck is accelerating at 0.5 m/s² up a slope of 5 degrees.If the opposing forces due to road friction and air resistance are 80 N per 1000 kg of truck mass,calculate the driving force needed for the truck to accelerate up the incline.