Physics Semester Exam Review

Front

What is centripetal force?

Back

Centripetal force is the net force that acts on an object moving in a circular path, directed towards the center of the circle.

Front

How does the centripetal force change if the velocity of an object moving in a circle triples?

Back

The centripetal force multiplies by 9.

Front

What is the formula for calculating centripetal force?

Back

Centripetal force (Fc) = (mass (m) * velocity (v)^2) / radius (r).

Front

What happens to the speed of an object if the net force acting on it is zero?

Back

If the net force is zero, the speed of the object remains constant.

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with negligible air resistance.

Front

How does the time of free fall relate to the height from which an object is dropped?

Back

The time of free fall increases with the square root of the height; if height quadruples, time doubles.

Front

What is the relationship between velocity and time in a velocity vs. time graph?

Back

The slope of a velocity vs. time graph represents acceleration.

Front

What does a horizontal line on a velocity vs. time graph indicate?

Back

A horizontal line indicates constant velocity.

Front

What is the effect of air resistance on falling objects?

Back

Air resistance opposes the motion of falling objects, reducing their acceleration.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity representing how fast an object moves, while velocity is a vector quantity that includes direction.