Physics Facts: Unit 4, Energy

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 Gravitational Potential Energy?

Back

Gravitational Potential Energy is the energy stored in an object as it is raised above the ground, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is Spring (Elastic) Potential Energy?

Back

Spring Potential Energy is the energy stored in a compressed or stretched spring, calculated as PE = 1/2 kx², where k is the spring constant and x is the distance stretched or compressed from equilibrium.

Front

What does 'work' mean in physics?

Back

In physics, 'work' refers to the energy transferred in or out of a system by an external force, calculated as W = Fd cos(θ), where F is force, d is displacement, and θ is the angle between the force and displacement.

Front

How is work done by a force represented graphically?

Back

The work done by a force is equal to the area under a force vs. displacement graph.

Front

What is the formula for calculating work?

Back

W = Fd cos(θ), where W is work, F is force, d is displacement, and θ is the angle between the force and displacement.

Front

What is the relationship between work and energy?

Back

Work is a means of transferring energy; when work is done on an object, energy is transferred to or from that object.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

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

Back

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

Front

What is the formula for gravitational potential energy?

Back

PE = mgh, where PE is gravitational potential energy, m is mass, g is acceleration due to gravity, and h is height.