Work and Power

Front

What is the definition of 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 calculated using the formula: Work = Force × Distance.

Front

What is the formula for calculating Power?

Back

Power is defined as the rate at which work is done. It is calculated using the formula: Power = Work / Time.

Front

What is the unit of Work?

Back

The unit of Work is the Joule (J), which is defined as the work done when a force of one newton displaces an object by one meter.

Front

What is the unit of Power?

Back

The unit of Power is the Watt (W), which is defined as one joule per second.

Front

If a force of 50 N moves an object 4 meters, how much work is done?

Back

Work = Force × Distance = 50 N × 4 m = 200 J.

Front

What is the relationship between Work and Power?

Back

Power is the rate at which work is done. If more work is done in a shorter amount of time, the power is greater.

Front

What happens to the work done if the force is doubled while the distance remains the same?

Back

If the force is doubled, the work done also doubles, since Work = Force × Distance.

Front

How much work is done if an object is lifted vertically with a force equal to its weight?

Back

The work done is equal to the weight of the object multiplied by the height it is lifted.

Front

What is the significance of the angle in the Work formula?

Back

The angle between the force and the direction of motion affects the work done. Work = Force × Distance × cos(θ), where θ is the angle between the force and the direction of motion.

Front

If no movement occurs, how much work is done?

Back

If there is no movement, the work done is 0 J, regardless of the force applied.