Acceleration and Force

Front

What force slows down objects falling through the air?

Back

Air resistance.

Front

Which of the following is not an example of acceleration?

Back

Driving at a constant speed.

Front

What causes changes in the speed and/or direction of motion?

Back

Force.

Front

If the velocity vector and acceleration vectors are moving in the same direction, what happens to the speed?

Back

Speed will increase.

Front

What is the SI unit for force?

Back

Newton (N).

Front

Define acceleration.

Back

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

Front

What is the formula for calculating force?

Back

Force = mass × acceleration (F = ma).

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What happens to an object's acceleration if the net force acting on it is zero?

Back

The object will not accelerate; it will maintain its current state of motion.

Front

What is the relationship between mass and acceleration according to Newton's second law?

Back

For a given force, an increase in mass results in a decrease in acceleration.