E-3 Flashcard

Front

What happens to an object's motion when no external forces act on it?

Back

The object will continue to move at a constant speed in a straight line.

Front

Define velocity.

Back

Velocity is the speed of an object in a specific direction.

Front

What is the relationship between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

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 happens to kinetic energy when an object comes to a stop due to friction?

Back

The kinetic energy is transformed into thermal energy due to friction.

Front

What is the principle of conservation of energy?

Back

The total energy in a closed system remains constant; energy can neither be created nor destroyed, only transformed from one form to another.

Front

Define acceleration.

Back

Acceleration is the rate of change of velocity of an object, which can be caused by a change in speed or direction.

Front

What is the difference between speed and acceleration?

Back

Speed is how fast an object is moving, while acceleration is how quickly the speed of the object is changing.

Front

What does it mean for two objects to have the same rate of change of velocity?

Back

It means that both objects are experiencing the same acceleration.

Front

Explain what happens during a collision between two carts in terms of kinetic energy.

Back

During a collision, kinetic energy can be transferred from one cart to another, depending on their speeds and masses.