Work

Front

What is the definition of work in physics?

Back

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object moves in the direction of the force.

Front

What are the units of work?

Back

The units of work are joules (J).

Front

True or False: You do work when you hold an object stationary.

Back

False. Work is only done when an object moves in the direction of the applied force.

Front

If a force of 50 N is applied to move an object 3 m, how much work is done?

Back

150 J (Work = Force x Distance = 50 N x 3 m).

Front

What is the formula for calculating work?

Back

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

Front

What is the relationship between work and energy?

Back

Work transfers energy from one system to another.

Front

If a person pushes a cart with a force of 60 N for 2 m, how much work is done?

Back

120 J (Work = 60 N x 2 m).

Front

What is the work done if no movement occurs despite applying a force?

Back

No work is done if there is no movement, regardless of the force applied.

Front

If Jay Loppy pushes his van 20 meters with a force of 100 N, how much work is done?

Back

2,000 J (Work = 100 N x 20 m).

Front

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

Back

The angle determines how much of the force contributes to the work done; only the component of the force in the direction of motion does work.