Chapter 14/15 Work, Power, and Energy

Front

What is the unit of measurement for work and energy?

Back

Joules (J)

Front

How do you calculate gravitational potential energy?

Back

Gravitational potential energy (PE) = mass (m) × gravitational acceleration (g) × height (h).

Front

What happens to kinetic energy when an object comes to a stop?

Back

Kinetic energy is converted to heat through friction.

Front

What is the relationship between speed and kinetic energy?

Back

The faster an object moves, the more kinetic energy it has.

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) = 0.5 × mass (m) × velocity (v)².

Front

If a rock has 2000 J of kinetic energy and a velocity of 20 m/s, what is its mass?

Back

10 kg.

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.

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 principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What type of energy is stored in an object due to its position?

Back

Potential energy.