Pretest Physical Energy

Front

What is the formula to calculate velocity?

Back

Velocity = distance divided by time.

Front

What is net force?

Back

Net force is the overall force acting on an object, taking into account all the individual forces.

Front

What does the Law of Inertia state?

Back

The Law of Inertia, or Newton's 1st law, states that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an unbalanced force.

Front

What does an unbalanced force cause?

Back

An unbalanced force causes an object to change its motion.

Front

What does the formula d/t represent?

Back

The formula d/t is used for calculating speed and velocity.

Front

What is the unit of force?

Back

The unit of force is Newton (N).

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object.

Front

What is the relationship between mass and force?

Back

According to Newton's 2nd law, force equals mass times acceleration (F = ma).

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 is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.