Work & Energy Review

Front

What is the formula for calculating potential energy?

Back

Potential energy (PE) = mass (m) × acceleration due to gravity (g) × height (h)

Front

What happens to the velocity of two balls of equal mass rolling down a frictionless hill?

Back

They will have the same velocity when they hit the ground, regardless of the path taken.

Front

How do you calculate power in a physics context?

Back

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

Front

What is the relationship between mechanical energy, kinetic energy, and potential energy?

Back

Mechanical energy is equal to the sum of kinetic energy and potential energy.

Front

How is work defined in physics?

Back

Work is defined as the product of force exerted parallel to the direction of displacement and the displacement itself.

Front

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

Back

The unit of work is the Joule (J).

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy (KE) = 1/2 × mass (m) × velocity (v)².

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed; it can only be transformed from one form to another.

Front

What is the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on position, while kinetic energy is the energy of motion.

Front

What factors affect the gravitational potential energy of an object?

Back

Gravitational potential energy depends on the object's mass, the height above a reference point, and the acceleration due to gravity.