Physics Review: Work Energy Power Test

Front

What is the formula for gravitational potential energy?

Back

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

Front

What is the value of gravitational acceleration on Earth?

Back

Approximately 9.81 m/s².

Front

Calculate the gravitational potential energy of a 2 kg book placed on a table that is 2 meters above the floor.

Back

39.2 J.

Front

Define Potential Energy.

Back

The energy that an object stores due to its position or state.

Front

What is the formula for calculating power?

Back

Power (P) = Work (W) / Time (t).

Front

An engine generates 1200 W of power. Calculate the time required for the engine to complete 24000 J of work.

Back

20 seconds.

Front

Define conservation of energy.

Back

The total energy of an isolated system remains constant over time.

Front

What is the formula for kinetic energy?

Back

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

Front

Given that a system has a total mechanical energy of 800 J, and its kinetic energy at a particular instant is 350 J, what is the potential energy of the system at that moment?

Back

450 J.

Front

What is the principle of work-energy theorem?

Back

The work done on an object is equal to the change in its kinetic energy.