Understanding Power and Work

Front

What do we call the rate at which work is done or the amount of work done per unit of time?

Back

Power

Front

What basically tells us how quickly work is being done?

Back

Power

Front

If you and your friend both move the same box, but you do it faster, who has more power?

Back

You, the one who moves it faster has more power.

Front

What is the unit of measurement for power?

Back

Watt

Front

What is the formula to find power?

Back

Power = Work / Time

Front

1 Watt is equal to how many Joules?

Back

1 Joule per second

Front

If all students were asked to lift a box with the same amount of mass, all students did the same amount of ________ (used the same force to lift the mass the same distance), whoever raised the mass faster had the most power.

Back

work

Front

If all students were asked to lift a box with the same amount of mass, all students did the same amount of work (used the same force to lift the mass the same distance), whoever raised the mass faster had the most _______.

Back

power

Front

An electric machine makes use of 300 J of energy to do work in 10s. How much power does it use?

Back

30 Watts

Front

A worker lifts a 0.30 kg framed picture and hangs it from a nail on the wall at a height of 1.8 m. How much work was done when lifting the picture?

Back

5.4 Joules