E-3 Flashcard

Front

What is kinetic energy?

Back

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

Front

What happens to an object's kinetic energy when it speeds up?

Back

When an object speeds up, its kinetic energy increases because kinetic energy is directly proportional to the square of its velocity.

Front

What is the relationship between speed and kinetic energy?

Back

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

Front

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

Back

When an object comes to a stop, its kinetic energy decreases to zero.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

Front

How does friction affect kinetic energy?

Back

Friction converts kinetic energy into thermal energy, causing the object to slow down.

Front

What is a velocity vector?

Back

A velocity vector is a quantity that has both magnitude (speed) and direction, indicating how fast and in which direction an object is moving.

Front

What is the effect of surface type on the speed of an object?

Back

Different surfaces provide varying levels of friction, affecting the speed of an object. For example, a toy car moves faster on ice than on grass.

Front

What happens to energy when brakes are applied to a moving vehicle?

Back

When brakes are applied, the kinetic energy of the vehicle is converted into thermal energy due to friction between the brake pads and wheels.

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.