Work and Power REVIEW

Front

What is the formula for calculating work done?

Back

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

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

How is power defined in physics?

Back

Power is defined as the rate at which work is done or energy is transferred over time.

Front

What is the formula for calculating power?

Back

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

Front

What is the unit of power in the International System of Units (SI)?

Back

The unit of power is the Watt (W), where 1 Watt = 1 Joule/second.

Front

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

Back

Work done = 50 N × 4 m = 200 J.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

What does it mean for work to be done on an object?

Back

Work is done on an object when a force causes the object to move in the direction of the force.

Front

What is the significance of the angle θ in the work formula?

Back

The angle θ affects the amount of work done; work is maximized when the force is applied in the same direction as the motion (θ = 0°).

Front

What is the condition for no work to be done on an object?

Back

No work is done if the object does not move, or if the force is perpendicular to the direction of motion (θ = 90°).