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WorksheetsMomentum and Energy
Total questions: 20
Worksheet time: 37mins
A spring with a spring constant of 68 newtons per
meter hangs from a ceiling. When a 12-newton
downward force is applied to the free end of the
spring, the spring stretches a total distance of
0.18 m
0.59 m
5.7 m
820 m
As a student walks downhill at constant speed,
his gravitational potential energy
increases and his kinetic energy increases
increases and his kinetic energy remains the
same
decreases and his kinetic energy increases
decreases and his kinetic energy remains the
same
When 150 joules of work is done on a system by
an external force of 15 newtons in 20. seconds,
the total energy of that system increases by
1.5 × 102 J
2.0 × 102 J
3.0 × 102 J
2.3 × 103 J
A person on a ledge throws a ball vertically
downward, striking the ground below the ledge
with 200 joules of kinetic energy. The person
then throws an identical ball vertically upward at
the same initial speed from the same point.
What is the kinetic energy of the second ball
when it hits the ground? [Neglect friction.]
200 J
400 J
less than 200 J
more than 400 J
Two construction cranes are used to lift identical
1200-kilogram loads of bricks the same vertical
distance. The first crane lifts the bricks in
20. seconds and the second crane lifts the bricks
in 40. seconds. Compared to the power
developed by the first crane, the power
developed by the second crane is
the same
twice as great
half as great
four times as great
A 1.47-newton baseball is dropped from a height of 10.0 meters and falls through the air to the ground. The kinetic energy of the ball is 12.0 joules the instant before the ball strikes the ground. The maximum amount of mechanical energy converted to internal energy during the fall is
2.7 J
12.0 J
14.7 J
26.7 J
The amount of electric energy consumed by a 60.0-watt lightbulb for 1.00 minute could lift a 10.0 newton object to a maximum vertical height of
6.00 m
36.7 m
360. m
600. m
A golf club hits a stationary 0.050-kilogram golf ball with an average force of 5.0×103 Newtons, accelerating the ball to a speed of 44 meters per second. What is the magnitude of the impulse imparted to the ball by the golf club?
2.2 N⋅s
1.1×104 N⋅s
880 N⋅s
2.2 ×105 N⋅s
A tennis player’s racket applies an average force of 200. newtons to a tennis ball for 0.025 second. The average force exerted on the racket by the tennis ball is
0.025 N
200. N
5.0 N
80.0 N
A spring has an unstretched length of 0.40 meter. The spring is stretched to a length of 0.60 meter when a 10.-newton weight is hung motionless from one end. The spring constant of this spring is
10. N/m
25 N/m
17 N/m
50. N/m
After a 65-newton weight has fallen freely from rest a vertical distance of 5.3 meters, the kinetic energy of the weight is
12 J
340 J
910 J
1800 J
An object is thrown straight upward. Which graph best represents the relationship between the object’s kinetic energy and the height of the object above its release point? [Neglect friction.]
A car engine supplies 2.0×103 joules of energy during the 10. seconds it takes to accelerate the car along a horizontal surface. What is the average power developed by the car engine while it is accelerating?
2.0×101 W
2.0×102 W
2.0×103 W
2.0×104 W
A 7.0-kilogram cart, A, and a 3.0-kilogram cart, B, are initially held together at rest on a horizontal, frictionless surface. When a compressed spring attached to one of the carts is released, the carts are pushed apart. After the spring is released, the speed of cart B is 6.0 meters per second, as
represented in the diagram below. What is the speed of cart A after the spring is released?
14 m/s
6.0 m/s
3.0 m/s
2.6 m/s
The data table below lists the mass and speed of four different objects. Which object has the greatest magnitude of momentum?
A
B
C
D
A blue lab cart is traveling west on a track when it collides with and sticks to a red lab cart traveling east. The magnitude of the momentum of the blue cart before the collision is 2.0 kilogram • meters per second, and the magnitude of the momentum of the red cart before the collision is 3.0 kilogram • meters per second. The magnitude of the total momentum of the two carts after the collision is
1.0 kg • m/s
2.0 kg • m/s
3.0 kg • m/s
5.0 kg • m/s
A block initially at rest on a horizontal, frictionless surface is accelerated by a constant horizontal force of 5.0 newtons. If 15 joules of work is done on the block by this force while accelerating it, the kinetic energy of the block increases by
3.0 J
15 J
20. J
75 J
As a box is pushed 30. meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300. joules. How much total internal energy is produced during this process?
150 J
450 J
250 J
750 J
Which statement describes the kinetic energy and total mechanical energy of a block as it is pulled at constant speed up an incline?
Kinetic energy decreases and total mechanical energy increases.
Kinetic energy decreases and total mechanical energy remains the same.
Kinetic energy remains the same and total mechanical energy increases.
Kinetic energy remains the same and total mechanical energy remains the same.
What is the total amount of work required to move a proton through a potential difference of 100. volts?
1.60 × 10–21 J
1.60 × 10–17 J
1.00 × 102 J
6.25 × 1020 J
