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Recall Quiz - Power

Last updated over 5 years ago

4 Nsɛmmisa

1

Asemmisa {{asɛmmisaAhyɛnsode}}

1.

Write the equation that links work done, time and power.

Workdone = power ÷ time

power = time ÷ work done

Power = work done ÷ time

1

1

1

Asemmisa {{asɛmmisaAhyɛnsode}}

2.

Define power.

The rate at which work is done.

The strength of an object

The force that causes an object to be displaced

Asemmisa {{asɛmmisaAhyɛnsode}}

3.

How many Watts are there in 70J/s?.

7W

70W

0.7W

Asemmisa {{asɛmmisaAhyɛnsode}}

4.

Electric motor A lifts a mass of 50g 1m into the air in 5 seconds. Electric motor B lifts a mass of 50g 1m into the air in 6 seconds. Which electrical motor is more powerful

Electric Motor A

Electric Motor B