Energy, Work and Power

Front

What is the formula for calculating work?

Back

Work = Force x Distance

Front

If a weightlifter lifts a 300 N weight 1.5 m, how much work is done?

Back

900 J

Front

What is the formula for calculating power?

Back

Power = Work / Time

Front

If you do 90 J of work in 30 seconds, what is your power output?

Back

3 watts

Front

What type of energy conversion occurs when rubbing hands together?

Back

Mechanical energy into thermal energy

Front

How do simple machines make work easier?

Back

By increasing the distance over which work is done

Front

What type of simple machine is a bike pedal?

Back

Wheel & Axle

Front

What is the unit of work in the International System of Units (SI)?

Back

Joule (J)

Front

What is the relationship between work and energy?

Back

Work is done when energy is transferred or transformed.

Front

What is the definition of power in physics?

Back

Power is the rate at which work is done or energy is transferred.