Work Intro

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 is the formula for calculating work?

Back

Work (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?

Back

The unit of work is the Joule (J), which is equivalent to one Newton meter (N·m).

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

Is lifting a weight an example of work?

Back

Yes, lifting a weight is an example of work because a force is applied to lift the weight against gravity.

Front

What is the unit for force?

Back

The unit for force is the Newton (N).

Front

What is the unit for distance?

Back

The unit for distance is the meter (m).

Front

If no movement occurs, is work done?

Back

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

Front

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

Back

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

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.