Work and Power - Level 1 Physics

Front

What is the equation for work?

Back

W = F x d

Front

If you pull the trolley along a flat floor horizontally. Which force do you use to calculate the work done?

Back

Pulling force

Front

If you pull the trolley vertically upwards using a crane, which force do you use to calculate the work done?

Back

Weight

Front

The force used in the work equation has to always be acting in the same direction as the movement of the object.

Back

True

Front

Which equation is the one for power?

Back

P = W / t

Front

Mike and Ian move 50 m on a snow lift which uses 750 N of force to move them in 75 seconds. Calculate the power of the lift.

Back

500 W

Front

Calculate the penguin power for Ian and Steve skiing down a 75 m slope in 80 seconds using 400 N of penguin force.

Back

375 W

Front

Mike and Peter are climbing to the top. Both take the same time, do the same route, but Mike has a mass of 25 kg while Peter has a mass of 30 kg. (He is a bit taller). Which penguin does the most work and why?

Back

Peter as he does more work over the same time than Mike because he has a bigger weight force

Front

Calculate the gravitational potential energy of a 500 kg roller coaster car at the top of a ride where the vertical distance from top to bottom is 20 m.

Back

100 000J

Front

The roller coaster car has a mass of 500 kg. It is pulled from position 1 to 2 (30 m) by a motor. At the top of the ride the vertical distance top to bottom is 20 m. The motor pulls the car with a 4000 N force. Calculate the work done getting the car to the top of the ride.

Back

120 000J