Work and Gravitational Potential Energy

Front

What is the formula for calculating work done when a force is applied?

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 in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

How do you calculate gravitational potential energy (GPE)?

Back

Gravitational Potential Energy (GPE) = mass (m) × gravitational acceleration (g) × height (h).

Front

What is the value of gravitational acceleration (g) on Earth?

Back

The value of gravitational acceleration (g) on Earth is approximately 9.81 m/s².

Front

If a 20 kg object is lowered 2 meters, what is the work done?

Back

The work done is -400 J (negative because the force of gravity is acting in the opposite direction to the motion).

Front

What happens to gravitational potential energy when an object is lifted higher?

Back

The gravitational potential energy increases as the height of the object increases.

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

If a force of 60 N is applied to push a cart for 2 meters, how much work is done?

Back

The work done is 120 J.

Front

Which object has more gravitational potential energy: a 75 kg weight lifted 1 m off the ground or a 50 kg weight lifted 2 m?

Back

The 75 kg weight lifted 1 m has more gravitational potential energy.

Front

What is the significance of the negative sign in work calculations?

Back

The negative sign indicates that the work is done against the direction of the force (e.g., lowering an object).