Work and Power

Front

What is Work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force. 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 calculated as the work done divided by the time taken. Formula: Power (P) = Work (W) / Time (t)

Front

How do you calculate Work?

Back

Work is calculated using the formula: Work (W) = Force (F) × Distance (d). The force must be in the same direction as the movement.

Front

What is the unit of Work?

Back

The unit of Work is the Joule (J). One Joule is defined as the work done when a force of one newton moves an object one meter.

Front

What is the unit of Power?

Back

The unit of Power is the Watt (W). One Watt is equal to one Joule per second (1 W = 1 J/s).

Front

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

Back

Work = Force × Distance = 10 N × 5 m = 50 J.

Front

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

Back

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

Front

What is the relationship between Work and Energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object.

Front

What does one Joule represent?

Back

One Joule is the amount of work done when a force of one newton moves an object one meter in the direction of the force.

Front

If a weightlifter lifts a 600 N weight 2 m, how much work is done?

Back

Work = Force × Distance = 600 N × 2 m = 1200 J.