NCFE Physical Science Practice

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

At which position on a roller coaster does the car have the greatest kinetic energy?

Back

The roller coaster car has the greatest kinetic energy at position X, where it is moving the fastest.

Front

What is the difference 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 happens to the momentum of two colliding objects?

Back

In a collision, the total momentum before the collision is equal to the total momentum after the collision, according to the law of conservation of momentum.

Front

What is the formula for calculating momentum?

Back

Momentum (p) is calculated using the formula p = mv, where m is mass and v is velocity.

Front

Give an example of kinetic energy.

Back

An example of kinetic energy is water falling from a fountain sculpture.

Front

What is the momentum of a bowling ball with a mass of 8 kg rolling at 2.0 m/s?

Back

The momentum of the bowling ball is 16.0 kg x m/s, calculated as p = mv = 8 kg * 2.0 m/s.

Front

What is the frame of reference in physics?

Back

The frame of reference is a set of coordinates or a viewpoint used to measure and describe the position and motion of objects.

Front

How does the momentum of toy car X change after colliding with toy car Y?

Back

After the collision, toy car X's momentum decreases while toy car Y's momentum increases.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, such as a rock resting on a ledge.