Semester Exam Review Physics

Front

What is the formula for calculating velocity?

Back

v = displacement / time

Front

What are the units for velocity?

Back

m/s

Front

What is the formula for calculating speed?

Back

s = distance / time

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

If a man runs 5600 m South in 1450 sec and then runs 10,000 m North in 1950 sec, what is his total displacement?

Back

Displacement = final position - initial position = (10000 m North - 5600 m South) = 4400 m North.

Front

How do you calculate average speed?

Back

Average speed = total distance / total time.

Front

What is Newton's First Law of Motion?

Back

An object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net external force.

Front

What is Newton's Second Law of Motion?

Back

F = ma (Force equals mass times acceleration).

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

If a car travels 100 m in 10 seconds, what is its speed?

Back

Speed = distance / time = 100 m / 10 s = 10 m/s.