Work & Power

Front

What is Work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is measured in joules (J).

Front

What is the formula for calculating Work?

Back

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

Front

What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred over time. It is measured in watts (W).

Front

What is the formula for calculating Power?

Back

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

Front

What is the unit of Work?

Back

The unit of Work is the joule (J).

Front

How do you calculate the work done when lifting an object vertically?

Back

Work done (W) = Weight of the object (mg) × Height (h) lifted.

Front

If a force of 50 N is applied to move an object 10 m, how much work is done?

Back

Work = Force × Distance = 50 N × 10 m = 500 J.

Front

In which situation is no work done?

Back

When carrying an object at a constant height without moving it horizontally, no work is done on the object.

Front

What is the relationship between Work and Energy?

Back

Work done on an object results in a change in its energy. Energy can be transferred or transformed through work.

Front

If 100 J of work is done in 5 seconds, what is the power output?

Back

Power = Work / Time = 100 J / 5 s = 20 W.