WorksheetsEnergy Test B
Total questions: 26
Worksheet time: 7hrs 30mins
A remote control car has 8 J of kinetic energy. What would the kinetic energy be if its speed halves?
1 J
2 J
4 J
16 J
A 5 kg mass is lifted from the ground to 10m. The gravitational potential energy of the mass is increased by approximately:
5 J
10 J
50 J
500 J
A 2.5 kg brick falls from a 3 m high roof. What is the approximate kinetic energy of the brick just before it touches the ground?
75 J
38 J
12 J
11 J
How much work is done by a 6N force exerted on an object for 3m?
3 J
6 J
9 J
18 J
A high diver steps off a platform 10m above the water. If no air resistance is present, during the fall there will be a decrease in the diver’s:
Gravitational Potential Energy
Total Mechanical Energy
Kinetic Energy
Work
What is the kinetic energy of a 4 kg toy car moving at 5 m/s?
5 J
10 j
25 J
50 J
An 80 kg cyclist is going 6 m/s when he hits the breaks. How much work must his breaks do to bring him to a stop?
47040 J
4800 J
4 J
1440 J
What is the mass of an object with a kinetic energy of 500 J and a speed of 10 m/s?
1 kg
5 kg
10 kg
50 kg
Which has had more work done to it: a 4 kg rock pushed for 5 m with 3 N up or a 3 kg rock pushed for 3 m with 5 N?
The 4 kg rock.
The 3 kg rock.
They have the same work done to them.
There is not enough information given to answer this question.
Which has more kinetic energy: a 4 kg rock moving at 3 m/s or a 3 kg rock moving at 4 m/s?
The 4 kg rock.
The 3 kg rock.
The Kinetic Energies are the same.
There is not enough information given to answer this question.
Which has more potential energy: a 4 kg rock that was moved 3 m up or a 3 kg rock that was moved 4 m up?
The 4 kg rock.
The 3 kg rock.
The Potential Energies are the same.
There is not enough information given to answer this question.
A race car speeds up along a flat straight away. Which of the following is increasing?
The Kinetic Energy.
The Potential Energy.
Neither KE or PE is increasing.
Both KE and PE are increasing.
A skydiver decelerates after pulling his chute while falling. Which of the following is increasing?
The Kinetic Energy.
The Potential Energy.
Neither KE or PE is increasing.
Both KE and PE are increasing.
A rocket blasts off from Earth’s surface, picking up speed. Which of the following is increasing?
The Kinetic Energy.
The Potential Energy.
Neight PE or KE is increasing.
Both PE and KE are increasing.
According to the law of conservation of energy, at the bottom of which incline would a ball have the largest velocity? Assume the heights are equal and that there are no resistive forces, such as friction.
Each ball would have the same velocity.
In the absence of external resistive forces, which of the following will determine the speed of the ball at the bottom of a ramp?
The mass of the ball.
The starting height of the ramp.
The angle of the ramp.
All factors listed will affect the speed.
What do we do with energy?
Compound it!
Conserve it!
Conflate it!
Confound it!
A block of ice is sliding down a hill, as shown. Choose the correct energy bar chart when the block is at point A.
A block of ice is sliding down a hill, as shown. Choose the correct energy bar chart when the block is at point B.
A block of ice is sliding down a hill, as shown. Choose the correct energy bar chart when the block is at point C.
A block of ice is sliding down a hill, as shown. Choose the correct energy bar chart when the block is at point D.
If 7 kg of ice starts on top of a hill that is 6 m high, how much potential energy does it have?
411.6 J
42 J
68.6 J
617.4 J
A 7 kg of ice starts on top of a hill that is 6m high and slides down. How much kinetic energy will it have the bottom of the hill (assuming it starts from rest)?
617.4 J
411.6 J
42 J
205.8 J
A 7 kg of ice starts on top of a hill that is 6m high and slides down. How fast will the block of ice be traveling when it gets to the bottom of the hill (assuming it starts from rest)?
10.8 m/s
42 m/s
6.5 m/s
20.3 m/s
The ice block has 2000 J of kinetic energy when it slides on a patch of concrete, experiencing 160 N of friction. How far will the block slide before coming to a stop?
12.5 m
0.08 m
320,000 m
565.7 m
A 5 kg rock is dropped from 6 m off the ground. How fast is it going when it is 2 m off the ground?
78.3 m/s
8.85 m/s
294 m/s
10.8 m/s
