Energy Bar Charts Flashcard

Front

What is an energy bar chart?

Back

An energy bar chart visually represents the different forms of energy in a system, showing how energy is transferred or transformed during a process.

Front

What does it mean for an object to move at constant speed?

Back

An object moving at constant speed travels the same distance in equal intervals of time, indicating no acceleration.

Front

What happens to mechanical energy when a weight is lifted at constant velocity?

Back

The mechanical energy of the weight-earth system increases as the weight gains gravitational potential energy.

Front

Describe the energy transformation when a marble rolls down a ramp.

Back

The marble's gravitational potential energy is converted into kinetic energy as it rolls down.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, typically related to its height.

Front

What is kinetic energy?

Back

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

Front

How does friction affect the energy of a moving object?

Back

Friction converts kinetic energy into thermal energy, causing the object to lose speed and energy.

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 does it mean for a car to accelerate?

Back

Acceleration refers to the rate of change of velocity of an object, meaning the car is increasing its speed.

Front

What is the relationship between work and energy?

Back

Work is done when energy is transferred to or from an object, resulting in a change in energy.