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

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

a ball starts from rest and rolls freely downhill

Answer this question:

the net work done by the two forces is zero

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

Kinetic energy is always positive.

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 situations is an example of an object with non zero kinetic energy?

a satellite in geosynchronous orbit

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

a box is pulled across a rough floor at constant velocity

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

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Duplicate of AP Physics 1: Energy

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Answers

1
Answer this question:
8 x 105 W
8 x 107 W
8 x 106 W
8 x 104 W
2
Answer this question:
The lighter one has 2x as much kinetic energy as the other.
The lighter one has ½ as much kinetic energy as the other.
The lighter one has the same kinetic energy as the other.
The lighter one has ¼ as much kinetic energy as the other.
3
Answer this question:
270 J
140 J
190 J
450 J
4
Answer this question:
8.7 m/s
59 m/s
7.7 m/s
76 m/s
5
Answer this question:
0.32
0.30
0.76
0.60
6
Which one of the following has the largest kinetic energy?
a raindrop falling
a jet airplane flying at its maximum speed
a woman swimming
the Earth moving in its orbit around the sun
7
In which of the following situations will there be an increase in kinetic energy?
a ball starts from rest and rolls freely downhill
a satellite travels in a circular orbit at a fixed altitude
a projectile approaches its maximum height
a box is pulled across a rough floor at constant speed
8
What power is needed to lift a 50 kg person a vertical distance of 5.0 m in 20.0 s?
none of the above
12.5 W
125 W
500 W
9
Answer this question:
80 J
160 J
100 J
30 J
10
Answer this question:
the work done by the tension force is zero joules
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
11
Answer this question:
80 J
300 J
400 J
100 J
12
Which one of the following statements concerning kinetic energy is true?
Kinetic energy is a quantitative measure of inertia.
Kinetic energy is always positive.
Kinetic energy is always equal to potential energy.
Kinetic energy can be measured in watts.
13
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 net work done by all the forces on the crate is zero
the work done on the object by gravity is zero joules
14
Work may be expressed using all of the following units except:
joule
foot pound
watt
Newton meter
15
Which one of the following situations is an example of an object with non zero kinetic energy?
a drum of diesel fuel on a parked truck
a satellite in geosynchronous orbit
a car parked at the top of the hill
a stationary pendulum
16
Which of the following choices is an example of a conservative force?
normal
static frictional force
elastic spring force
tension
17
Which of the following choices is an example of a non-conservative force?
electric force
gravitational force
kinetic frictional force
elastic spring force
18
Answer this question:
11.4 m/s
131 m/s
32.2 m/s
16.1 m/s
19
In which of the following situations is zero net work done?
a box is pulled across a rough floor at constant velocity
a projectile falls toward the surface of the Earth
a physics student stretches a spring
a ball rolls down an inclined plane
20
A force that acts on an object is said to be conservative if
it results in a change in the object's kinetic energy
it obey's Newton's laws of motion
it always acts in the direction of motion of the object
the work it does on the object is independent of the path

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