In which of the following situations will there be an increase in kinetic energy?

a ball starts from rest and rolls freely downhill

A donkey pulls a crate up a rough, inclined plane at constant speed. Which statement is FALSE?

the work done on the object by gravity is zero joules

Which one of the following statements concerning kinetic energy is true?

Kinetic energy is always positive.

A force that acts on an object is said to be conservative if

the work it does on the object is independent of the path

Which one of these objects does NOT have zero kinetic energy?

a satellite in geosynchronous orbit

Answer this question:

the net work done by the two forces is zero

In which of the following situations is zero net work done?

a box is pulled across a rough floor at constant velocity

Answer this question:

The lighter one has ½ as much kinetic energy as the other.

Which one of the following has the largest kinetic energy?

the Earth moving in its orbit around the sun

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AP Physics 1: Energy

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Questions 20

Answers

1
In which of the following situations will there be an increase in kinetic energy?
a box is pulled across a rough floor at constant speed
a ball starts from rest and rolls freely downhill
a projectile approaches its maximum height
a satellite travels in a circular orbit at a fixed altitude
2
A donkey pulls a crate up a rough, inclined plane at constant speed. Which statement is FALSE?
the gravitational potential energy is increasing
the work done on the crate by the normal force is zero
the work done on the object by gravity is zero joules
the net work done by all the forces on the crate is zero
3
Answer this question:
300 J
100 J
80 J
400 J
4
Which one of the following statements concerning kinetic energy is true?
Kinetic energy is always positive.
Kinetic energy is a quantitative measure of inertia.
Kinetic energy is always equal to potential energy.
Kinetic energy can be measured in watts.
5
A force that acts on an object is said to be conservative if
it always acts in the direction of motion of the object
it results in a change in the object's kinetic energy
the work it does on the object is independent of the path
it obey's Newton's laws of motion
6
Which one of these objects does NOT have zero kinetic energy?
a stationary pendulum
a satellite in geosynchronous orbit
a car parked at the top of the hill
a drum of diesel fuel on a parked truck
7
Answer this question:
140 J
450 J
180 J
270 J
8
Answer this question:
magnitude of tension work > magnitude of gravitational work
the net work done by the two forces is zero
magnitude of tension work < magnitude of gravitational work
the work done by the tension force is zero joules
9
Answer this question:
8 x 106 W
8 x 105 W
8 x 104 W
8 x 107 W
10
Which of the following choices is an example of a conservative force?
static frictional force
elastic spring force
tension
normal
11
What power is needed to lift a 50 kg person a vertical distance of 5.0 m in 20.0 s?
500 W
none of the above
125 W
12.5 W
12
In which of the following situations is zero net work done?
a box is pulled across a rough floor at constant velocity
a ball rolls down an inclined plane
a projectile falls toward the surface of the Earth
a physics student stretches a spring
13
Work may be expressed using all of the following units except:
joule
Newton meter
watt
foot pound
14
Answer this question:
0.60
0.32
0.76
0.30
15
Answer this question:
32.2 m/s
131 m/s
16.1 m/s
11.4 m/s
16
Answer this question:
160 J
30 J
100 J
80 J
17
Which of the following choices is an example of a non-conservative force?
kinetic frictional force
elastic spring force
gravitational force
electric force
18
Answer this question:
59 m/s
7.7 m/s
8.7 m/s
76 m/s
19
Answer this question:
The lighter one has the same kinetic energy as the other.
The lighter one has ½ as much kinetic energy as the other.
The lighter one has ¼ as much kinetic energy as the other.
The lighter one has 2x as much kinetic energy as the other.
20
Which one of the following has the largest kinetic energy?
the Earth moving in its orbit around the sun
a jet airplane flying at its maximum speed
a raindrop falling
a woman swimming

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