Work and Power Problems

Front

What is the formula for calculating work?

Back

Work = Force x Distance (W = F x d)

Front

How is power defined in physics?

Back

Power is the rate at which work is done, calculated as Power = Work / Time.

Front

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

Back

The unit of work is the Joule (J).

Front

If a force of 10 N moves an object 5 m, how much work is done?

Back

50 J (Work = 10 N x 5 m).

Front

What happens to power if the time taken to do the same amount of work is halved?

Back

The power doubles.

Front

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

Back

Power is equal to work divided by time (P = W / t).

Front

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

Back

The unit of power is the Watt (W).

Front

If a weightlifter does 800 J of work in 4 seconds, what is their power output?

Back

200 W (Power = 800 J / 4 s).

Front

What is the significance of mass in work and power problems?

Back

Mass is a measure of the amount of matter in an object and is constant; it affects the force required to move the object.

Front

How do you calculate the work done against gravity?

Back

Work done against gravity = Weight x Height (W = m x g x h).