Worksheetswork and power
Total questions: 15
Worksheet time: 8mins
What is the formula for calculating work?
Work = Force / Displacement
Work = Force × Displacement
Work = Displacement / Force
Work = Force - Displacement
Which of the following situations involves zero work?
Pushing a car that moves
Lifting a box upwards
push a wall
Dropping a stone
What is the SI unit for power?
Joule
Newton
Watt
Meter per second
Which type of work occurs when force and displacement are in the same direction?
Positive work
Negative work
Zero work
Opposing work
If a person does 40 J of work in 4 seconds, what is the power used?
10 W
20 W
8 W
160 W
Which of these situations represents negative work?
Pulling a sled forward
Slowing down a car with brakes
Lifting a box
Holding an object still
If a person pushes a box with 15 N force but it doesn’t move, the work done is:
15 J
Zero
30 J
45 J
The force applied to lift a box results in 200 J of work. If the box was lifted 2 meters, what force was applied?
400 N
200 N
100 N
50 N
Which formula represents power if work and time are known?
Power = Work × Time
Power = Work ÷ Time
Power = Time ÷ Work
Power = Work + Time
If a machine does 600 J of work in 3 seconds, what is the power output of the machine?
200 W
600 W
900 W
1800 W
If a car exerts a force of 500 N to move 10 meters, how much work is done?
500 J
5000 J
50 J
250 J
A 60 W light bulb runs for 2 hours. How much energy does it use? (Hint: Energy = Power × Time)
120 J
7.200 J
432.000 J
6.000 J
If you carry a 10 kg object horizontally without lifting or lowering it, how much work is done on the object? (Assume gravitational acceleration = 9.8 m/s²)
98 J
0 J
10 J
9.8 J
A person does 250 J of work by pushing a box for 5 meters. What force was applied?
50 N
25 N
5 N
1250 N
What happens to the power required if the same amount of work is done in a shorter time?
Power increases
Power decreases
Power stays the same
It depends on the force applied
