Question 1

What is the formula for calculating power?

Accepted Answer

Power = Work / Time

Answer

Power = Distance / Time

Answer

Power = Work x Time

Answer

Power = Force x Distance

Question 2

If you lift a box weighing 20 N to a height of 2 meters, how much work do you do?

Accepted Answer

40 Joules

Answer

30 Joules

Answer

10 Joules

Answer

50 Joules

Question 3

Which unit is used to measure power?

Accepted Answer

Watt

Answer

Meter

Answer

Joule

Answer

Newton

Question 4

If a machine does 100 Joules of work in 5 seconds, what is its power?

Accepted Answer

20 Watts

Answer

50 Watts

Answer

25 Watts

Answer

10 Watts

Question 5

What happens to the power when the same amount of work is done in a shorter time?

Accepted Answer

The power increases

Answer

Power does not depend on time

Answer

The power decreases

Answer

The power stays the same

Question 6

Which of the following is an example of work being done?

Accepted Answer

Pushing a box across the floor

Answer

Standing against a wall

Answer

Sitting on a chair

Answer

Holding a book still

Question 7

What is the unit of work?

Accepted Answer

Joules

Answer

Newton

Answer

meter

Answer

seconds

Question 8

What is the relationship between work, power, and time?

Accepted Answer

Power is work divided by time

Answer

Power measures only force applied

Answer

Power is time divided by work

Answer

Power adds work to time

Question 9

A car engine does 3000 Joules of work in 60 seconds. What is the power of the engine?

Accepted Answer

50 Watts

Answer

100 Watts

Answer

30 Watts

Answer

60 Watts

Question 10

Which of these scenarios involves power?

Accepted Answer

A person running up stairs

Answer

A book resting on a table

Answer

A car parked in a garage

Answer

A tree standing in a forest

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