Work and 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 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), where 1 Watt = 1 Joule/second.

Front

How is Work calculated?

Back

Work (W) is calculated using the formula: W = F × d × cos(θ), where F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of motion.

Front

What is the relationship between Work and Power?

Back

Power is the amount of work done per unit of time. The formula is: Power (P) = Work (W) / Time (t).

Front

What is the unit of Work?

Back

The unit of Work is the Joule (J).

Front

What is the unit of Power?

Back

The unit of Power is the Watt (W).

Front

If no movement occurs, is work done?

Back

No, if there is no movement in the direction of the applied force, then no work is done.

Front

How much work is done when lifting an object vertically?

Back

Work done (W) is equal to the weight of the object (force due to gravity) multiplied by the height it is lifted: W = m × g × h.

Front

What is the formula to calculate Power when Work and Time are known?

Back

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

Front

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

Back

Work (W) = F × d = 10 N × 5 m = 50 J.