5470 Conservation of Energy (PEg, KE only)

Front

What is the law of conservation of energy?

Back

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

Front

What is kinetic energy (KE)?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is gravitational potential energy (PEg)?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PEg = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How does kinetic energy change during a collision?

Back

In a collision, the kinetic energy of the colliding objects can decrease, increase, or remain the same, depending on the type of collision (elastic or inelastic).

Front

What happens to gravitational potential energy as an object moves downward?

Back

As an object moves downward, its gravitational potential energy decreases.

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy is proportional to the square of the speed; if speed doubles, kinetic energy increases by a factor of four.

Front

What is an elastic collision?

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is a collision in which momentum is conserved, but kinetic energy is not conserved.

Front

What happens to the kinetic energy of a skier going down a hill?

Back

As a skier goes down a hill, their gravitational potential energy is converted into kinetic energy, increasing their speed.

Front

What is the effect of friction on kinetic energy?

Back

Friction converts kinetic energy into thermal energy, reducing the total kinetic energy of the system.