Work and Power

Front

What is Work in physics?

Back

Work is defined as the product of force and the distance over which it is applied. It is measured in joules (J). Formula: Work (W) = Force (F) × Distance (d).

Front

What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is measured in watts (W). Formula: Power (P) = Work (W) / Time (t).

Front

What is the formula to calculate 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 unit is used to measure force?

Back

The unit of force is the newton (N).

Front

If a weightlifter lifts two 300 newton weights 1.5 meters, how much work is done?

Back

900 J (Work = Force × Distance = 600 N × 1.5 m).

Front

True or False: You do work only when you carry a box after lifting it from the floor.

Back

False. Work is done when a force is applied to move an object, regardless of whether it is lifted or carried.

Front

How much work is done when a force of 70 N is applied over a distance of 1.1 meters?

Back

77 J (Work = Force × Distance = 70 N × 1.1 m).

Front

What is the formula to calculate power?

Back

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

Front

If you move an 8-newton weight five meters in 4 seconds, how much power is generated?

Back

10 watts (Power = Work / Time = 40 J / 4 s).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy. Energy is transferred when work is done.