A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5 *105 N/m.At its greatest compression the reading on the scale is:

A) 15 N B) 29 N C) 1.5 *103 N D) 2.1 * 103 N E) 3.0 * 103 N A) 15 N B) 29 N C) 1.5 *103 N D) 2.1 * 103 N E) 3.0 * 103 N

A particle moving along the x axis is acted upon by a single force F = F0e-kx, where F0 and k are constants.The particle is released from rest at x = 0.It will attain a maximum kinetic energy of:

A) F0/k B) F0/ek C) kF0 D) 1/2(kF0)2 E) kekF0 A) F0/k B) F0/ek C) kF0 D) 1/2(kF0)2 E) kekF0

Exam 7: Kinetic Energy and Work

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A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5 *10⁵ N/m.At its greatest compression the reading on the scale is:

(Multiple Choice)

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Question 21

The mechanical advantage of any machine is:

(Multiple Choice)

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Question 22

A particle starts from rest at time t = 0 and moves along the x axis.If the net force on it is proportional to t, its kinetic energy is proportional to:

(Multiple Choice)

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Question 23

In the plot shown of force vs.distance, approximately how much work is done in moving an object from x = 5 m to x = 15 m?

(Multiple Choice)

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Question 24

Three identical springs (X, Y, Z)are arranged as shown.When a 4.0-kg mass is hung on X, the mass descends 3.0 cm.When a 6.0-kg mass is hung on Y, the mass descends:

(Multiple Choice)

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Question 25

Two objects with masses, m₁ and m₂, have the same kinetic energy and are both moving to the right.The same constant force is applied to the left to both masses.If m₁ = 4m₂, the ratio of the stopping distance of m₁ to that of m₂ is:

(Multiple Choice)

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Question 26

A man pushes an 80-N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30°with the horizontal.The force he exerts is parallel to the slope.If the speed of the crate is constant, then the work done by the man is:

(Multiple Choice)

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Question 27

Which of the following groups does NOT contain a scalar quantity?

(Multiple Choice)

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Question 28

Camping equipment weighing 6000 N is pulled across a frozen lake by means of a horizontal rope.The coefficient of kinetic friction is 0.05.How much work is done by the campers in pulling the equipment 1000 m if its speed is increasing at the constant rate of 0.20 m/s²?

(Multiple Choice)

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Question 29

A Boston Red Sox baseball player catches a ball of mass m that is moving toward him with speed v.While bringing the ball to rest, his hand moves back a distance d.Assuming constant deceleration, the horizontal force exerted on the ball by his hand is:

(Multiple Choice)

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Question 30

An object moves in a circle at constant speed.The work done by the centripetal force is zero because:

(Multiple Choice)

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Question 31

A baseball is hit high into the upper bleachers of left field.Over its entire flight the work done by gravity and the work done by air resistance, respectively, are:

(Multiple Choice)

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Question 32

A spring of spring constant k is attached to a block of mass m.The spring moves the block through a displacement x.How can you calculate how much work the spring does on the block?

(Multiple Choice)

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Question 33

A particle moving along the x axis is acted upon by a single force F = F₀e^-kx, where F₀ and k are constants.The particle is released from rest at x = 0.It will attain a maximum kinetic energy of:

(Multiple Choice)

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Question 34

Which of the following bodies has the largest kinetic energy?

(Multiple Choice)

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Question 35

When a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude F = Ax, where A is a constant.The work done by a person in stretching this rubber band from x = 0 to x = L is:

(Multiple Choice)

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Question 36

An 80-N crate slides with constant speed a distance of 5.0 m downward along a rough slope that makes an angle of 30° with the horizontal.The work done by the force of gravity is:

(Multiple Choice)

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Question 37

Which of the following is the correct combination of dimensions for energy?

(Multiple Choice)

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Question 38

A woman lifts a barbell 2.0 m in 5.0 s.If she lifts it the same distance in 10 s, the work done by her is:

(Multiple Choice)

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Question 39

A boy holds a 40-N weight at arm's length for 10 s.His arm is 1.5 m above the ground.The work done by the force of the boy on the weight while he is holding it is:

(Multiple Choice)

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Question 40

Showing 21 - 40 of 73

Exam 7: Kinetic Energy and Work

A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5 *105 N/m.At its greatest compression the reading on the scale is:

The mechanical advantage of any machine is:

A particle starts from rest at time t = 0 and moves along the x axis.If the net force on it is proportional to t, its kinetic energy is proportional to:

In the plot shown of force vs.distance, approximately how much work is done in moving an object from x = 5 m to x = 15 m?

Three identical springs (X, Y, Z)are arranged as shown.When a 4.0-kg mass is hung on X, the mass descends 3.0 cm.When a 6.0-kg mass is hung on Y, the mass descends:

Two objects with masses, m1 and m2, have the same kinetic energy and are both moving to the right.The same constant force is applied to the left to both masses.If m1 = 4m2, the ratio of the stopping distance of m1 to that of m2 is:

A man pushes an 80-N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30°with the horizontal.The force he exerts is parallel to the slope.If the speed of the crate is constant, then the work done by the man is:

Which of the following groups does NOT contain a scalar quantity?

Camping equipment weighing 6000 N is pulled across a frozen lake by means of a horizontal rope.The coefficient of kinetic friction is 0.05.How much work is done by the campers in pulling the equipment 1000 m if its speed is increasing at the constant rate of 0.20 m/s2?

A Boston Red Sox baseball player catches a ball of mass m that is moving toward him with speed v.While bringing the ball to rest, his hand moves back a distance d.Assuming constant deceleration, the horizontal force exerted on the ball by his hand is:

An object moves in a circle at constant speed.The work done by the centripetal force is zero because:

A baseball is hit high into the upper bleachers of left field.Over its entire flight the work done by gravity and the work done by air resistance, respectively, are:

A spring of spring constant k is attached to a block of mass m.The spring moves the block through a displacement x.How can you calculate how much work the spring does on the block?

A particle moving along the x axis is acted upon by a single force F = F0e-kx, where F0 and k are constants.The particle is released from rest at x = 0.It will attain a maximum kinetic energy of:

Which of the following bodies has the largest kinetic energy?

When a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude F = Ax, where A is a constant.The work done by a person in stretching this rubber band from x = 0 to x = L is:

An 80-N crate slides with constant speed a distance of 5.0 m downward along a rough slope that makes an angle of 30° with the horizontal.The work done by the force of gravity is:

Which of the following is the correct combination of dimensions for energy?

A woman lifts a barbell 2.0 m in 5.0 s.If she lifts it the same distance in 10 s, the work done by her is:

A boy holds a 40-N weight at arm's length for 10 s.His arm is 1.5 m above the ground.The work done by the force of the boy on the weight while he is holding it is:

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A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5 *10⁵ N/m.At its greatest compression the reading on the scale is:

Two objects with masses, m₁ and m₂, have the same kinetic energy and are both moving to the right.The same constant force is applied to the left to both masses.If m₁ = 4m₂, the ratio of the stopping distance of m₁ to that of m₂ is:

Camping equipment weighing 6000 N is pulled across a frozen lake by means of a horizontal rope.The coefficient of kinetic friction is 0.05.How much work is done by the campers in pulling the equipment 1000 m if its speed is increasing at the constant rate of 0.20 m/s²?

A particle moving along the x axis is acted upon by a single force F = F₀e^-kx, where F₀ and k are constants.The particle is released from rest at x = 0.It will attain a maximum kinetic energy of: