Work or Not Work

Front

What is the definition of work in physics?

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

Does standing still in one place count as work?

Back

No, standing still does not count as work because there is no movement in the direction of the applied force.

Front

What happens when you push against an immovable object?

Back

When you push against an immovable object, such as a brick wall, no work is done because there is no movement.

Front

What is an example of work being done?

Back

An example of work being done is when you lift a box off the ground; the force you apply (lifting) causes the box to move upward.

Front

Is pushing a stroller considered work?

Back

Yes, pushing a stroller is considered work because you are applying a force that causes the stroller to move.

Front

What is the formula for calculating work?

Back

The formula for calculating work is W = F × d × cos(θ), where W is work, F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of movement.

Front

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

Back

The unit of work in the SI system is the Joule (J).

Front

Can work be done if there is no movement?

Back

No, work cannot be done if there is no movement in the direction of the force applied.

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.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, such as gravitational potential energy, which depends on height.