Work and Power Problems

Front

What is the formula for calculating work done?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

What are the SI units for work?

Back

The SI unit for work is the Joule (J).

Front

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

Back

900 J.

Front

How do you calculate the work done when pushing an object?

Back

Work is calculated by multiplying the force applied by the distance moved in the direction of the force.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

What is the formula for calculating power?

Back

Power (P) = Work (W) / Time (t).

Front

What are the SI units for power?

Back

The SI unit for power is the Watt (W), which is equivalent to 1 Joule per second.

Front

If you push a cart with a force of 60 N for 2 m, how much work have you done?

Back

120 J.

Front

What is the definition of mass in physics?

Back

Mass is a measure of the amount of matter in an object, typically measured in kilograms (kg).

Front

If 150 Joules of work is needed to move a box 10 meters, what force was used?

Back

15 N.