Forces and Motion

Front

Which example identifies a change in motion that produces acceleration? Options: a ball moving at a constant speed around a circular track, a vehicle moving down the street at a steady speed, a speed skater moving at a constant speed on a straight track, a particle moving in a vacuum at constant velocity.

Back

a ball moving at a constant speed around a circular track

Front

The force that keeps an object moving in a circle is called

Back

centripetal force

Front

As an astronaut travels far away from Earth, her weight

Back

decreases because gravity decreases

Front

Your weight equals your

Back

mass times the acceleration due to gravity

Front

The slope of a speed-time graph indicates

Back

acceleration

Front

The SI unit of force is the

Options:

newton

,

joule

,

kilogram

,

meter

Back

newton

Front

What is the total displacement of a person who walks 1 mile every day, leaving and returning to the same point?

Back

0

Front

Which universal force acts only on the protons and neutrons in a nucleus?

Back

strong nuclear

Front

According to Newton's second law of motion, the acceleration of an object equals the net force acting on the object divided by the object's:

velocity

,

mass

,

momentum

,

weight

Back

mass

Front

Which distance can be most accurately measured with a ruler? Options: the length of a river, the distance between two cities, the width of a book, the size of an object under a microscope

Back

the width of a book