Pretest Physical Energy

Front

What is net force?

Back

Net force is the total force acting on an object when all the individual forces are combined. It determines the object's motion.

Front

How do you calculate net force when two forces are acting in the same direction?

Back

Add the magnitudes of the forces together.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, caused by the contact between two surfaces.

Front

What is average speed?

Back

Average speed is the total distance traveled divided by the total time taken.

Front

How do you calculate average speed?

Back

Average speed = total distance / total time.

Front

What is acceleration?

Back

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

Front

What is the formula for acceleration?

Back

Acceleration = (final velocity - initial velocity) / time.

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 displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction.

Front

What is work in physics?

Back

Work is done when a force causes an object to move in the direction of the force.