Exam 6: Conservation of Energy

A 1.1 kg seagull takes off from a piling along the California coast and accelerates within 0.50 s to a flight speed of 7.5 m/s along a slightly inclined path.At the end of the 0.50 s period,it is 5.3 m above its point of takeoff.What power was developed by the bird's wings?

(Multiple Choice)

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Question 21

A 20.0 kg box slides up a 12.0 m long incline at an angle of 30.0 degrees with the horizontal.A force of 150 N is applied to the box to pull it up the incline.The applied force makes an angle of 10.0 degrees to the incline.What is the work done by the applied force,in Joules?

(Multiple Choice)

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Question 22

A 3.00 kg pendulum bob on a string 2.00 m long,is released with a velocity of 2.00 m/s when the support string makes an angle of 45.0 degrees with the vertical.What is the tangential acceleration of the bob at the highest point of its motion?

(Multiple Choice)

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Question 23

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 2.0 m to 8.0 m?

(Multiple Choice)

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Question 24

A spring is stretched from 0.500 m to 0.800 m.Assume the un-stretched position is 0.00 m.If the spring constant of the spring is 10.0 N/m,what is the work done on the spring?

(Multiple Choice)

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Question 25

An 8000 kg satellite is launched from the surface of the earth,and injected into a circular orbit at an altitude of 100 km above the surface of the earth.The kinetic energy of the satellite in the circular orbit is (G = 6.67 $\times$ 10^-11 Nm²/kg², Me = 5.98 $\times$ 10²⁴ kg, Re = 6.38 $\times$ 10⁶ m)

(Multiple Choice)

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Question 26

A 5.00 gram bullet has a velocity of 300 m/s.It strikes a block of wood and penetrates to a distance of 10.0 cm.The average force of the block of wood on the bullet is

(Multiple Choice)

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Question 27

A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m.The spring is compressed by 8.0 cm and a 5.0 gram projectile is placed in the gun.The kinetic energy of the projectile when it is shot from the gun is

(Multiple Choice)

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Question 28

In order to conserve fuel,you modify your car by removing 100 kg of excess weight.How much energy is saved each time you drive up a 3 km high mountain?

(Multiple Choice)

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Question 29

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 0.0 m to 6.0 m?

(Multiple Choice)

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Question 30

A student lifts a weight of 10.0 N a distance of 0.5 meters.If this exercise is repeated 50 times in 100 seconds,then the power of this exercise is

(Multiple Choice)

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Question 31

A 2.00 kg pendulum bob on a string 2.00 m long,is released with a velocity of 1.50 m/s when the support string makes an angle of 30.0 degrees with the vertical.What is the tangential acceleration of the bob at the highest point of its motion?

(Multiple Choice)

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Question 32

A car traveling at 30 mph skids to a stop in 60 meters.If a car travels at 60 mph with the same skid conditions,then what is distance the car skids to come to a stop?

(Multiple Choice)

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Question 33

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 0.0 m to 10.0 m?

(Multiple Choice)

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Question 34

A 200 N box is pushed up an incline that is 5.00 m long and rises 1.00 m.The incline has a coefficient of kinetic friction of 0.200.The work done by the pushing force is

(Multiple Choice)

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Question 35

An 8000 kg satellite is launched from the surface of the earth,and injected into outer space a long distance from the earth.The kinetic energy needed to launch the satellite into outer space is (G = 6.67 $\times$ 10^-11 Nm²/kg², Me = 5.98 $\times$ 10²⁴ kg, Re = 6.38 $\times$ 10⁶ m)

(Multiple Choice)

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Question 36

A 2500 kg car accelerates from rest to a velocity of 10 m/s in 5.0 seconds.The power of the engine during this acceleration is

(Multiple Choice)

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Question 37

An asteroid,of mass 1.4 $\times$ 10¹⁴ kg is observed to have an escape speed equal to a typical person's speed attained by jumping off,3.0m/s.What is its radius?

(Multiple Choice)

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Question 38

A 2.00 kg pendulum bob on a string 1.50 m long is released with a velocity of 0.00 m/s when the support string makes an angle of 60.0 degrees with the vertical.What is the tension in the string at the bottom of the swing?

(Multiple Choice)

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Question 39

A 6.00 kg box slides up a 8.00 m long friction incline at an angle of 30.0 degrees by a force 50.0 N parallel to the incline.The coefficient of kinetic friction is 0.100.The work done against friction is

(Multiple Choice)

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Question 40

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Exam 6: Conservation of Energy

A 1.1 kg seagull takes off from a piling along the California coast and accelerates within 0.50 s to a flight speed of 7.5 m/s along a slightly inclined path.At the end of the 0.50 s period,it is 5.3 m above its point of takeoff.What power was developed by the bird's wings?

A 20.0 kg box slides up a 12.0 m long incline at an angle of 30.0 degrees with the horizontal.A force of 150 N is applied to the box to pull it up the incline.The applied force makes an angle of 10.0 degrees to the incline.What is the work done by the applied force,in Joules?

A 3.00 kg pendulum bob on a string 2.00 m long,is released with a velocity of 2.00 m/s when the support string makes an angle of 45.0 degrees with the vertical.What is the tangential acceleration of the bob at the highest point of its motion?

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 2.0 m to 8.0 m?

A spring is stretched from 0.500 m to 0.800 m.Assume the un-stretched position is 0.00 m.If the spring constant of the spring is 10.0 N/m,what is the work done on the spring?

A 5.00 gram bullet has a velocity of 300 m/s.It strikes a block of wood and penetrates to a distance of 10.0 cm.The average force of the block of wood on the bullet is

A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m.The spring is compressed by 8.0 cm and a 5.0 gram projectile is placed in the gun.The kinetic energy of the projectile when it is shot from the gun is

In order to conserve fuel,you modify your car by removing 100 kg of excess weight.How much energy is saved each time you drive up a 3 km high mountain?

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 0.0 m to 6.0 m?

A student lifts a weight of 10.0 N a distance of 0.5 meters.If this exercise is repeated 50 times in 100 seconds,then the power of this exercise is

A 2.00 kg pendulum bob on a string 2.00 m long,is released with a velocity of 1.50 m/s when the support string makes an angle of 30.0 degrees with the vertical.What is the tangential acceleration of the bob at the highest point of its motion?

A car traveling at 30 mph skids to a stop in 60 meters.If a car travels at 60 mph with the same skid conditions,then what is distance the car skids to come to a stop?

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 0.0 m to 10.0 m?

A 200 N box is pushed up an incline that is 5.00 m long and rises 1.00 m.The incline has a coefficient of kinetic friction of 0.200.The work done by the pushing force is

An 8000 kg satellite is launched from the surface of the earth,and injected into outer space a long distance from the earth.The kinetic energy needed to launch the satellite into outer space is (G = 6.67 ×\times× 10-11 Nm2/kg2, Me = 5.98 ×\times× 1024 kg, Re = 6.38 ×\times× 106 m)

A 2500 kg car accelerates from rest to a velocity of 10 m/s in 5.0 seconds.The power of the engine during this acceleration is

An asteroid,of mass 1.4 ×\times× 1014 kg is observed to have an escape speed equal to a typical person's speed attained by jumping off,3.0m/s.What is its radius?

A 2.00 kg pendulum bob on a string 1.50 m long is released with a velocity of 0.00 m/s when the support string makes an angle of 60.0 degrees with the vertical.What is the tension in the string at the bottom of the swing?

A 6.00 kg box slides up a 8.00 m long friction incline at an angle of 30.0 degrees by a force 50.0 N parallel to the incline.The coefficient of kinetic friction is 0.100.The work done against friction is

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An 8000 kg satellite is launched from the surface of the earth,and injected into outer space a long distance from the earth.The kinetic energy needed to launch the satellite into outer space is (G = 6.67 $\times$ 10^-11 Nm²/kg², Me = 5.98 $\times$ 10²⁴ kg, Re = 6.38 $\times$ 10⁶ m)

An asteroid,of mass 1.4 $\times$ 10¹⁴ kg is observed to have an escape speed equal to a typical person's speed attained by jumping off,3.0m/s.What is its radius?