PC 3.2 Quiz Review

Every object in the universe exerts a force on every other object.

• Mass

• Centripetal Force

• Gravity

• Friction

Weight is measured in _______.

• 9.8 m/s

• mass

• Newtons

• Microwelds

Earth exerts a stronger gravitational force than the moon because the Earth has more ____________.

• mass

• centripetal force

• land to water ratio

• population

The smaller the object, the ______________ the gravitational force.

• weaker

• greater

• less projectile

• more acceleration

A force directed toward the center of an object moving in a circular motion.

• mass

• centripetal force

• gravity

• friction

If you throw a ball as hard as you can, it will follow a pathway that

• is straight

• increases in acceleration (goes faster)

• is curved

• is resistant to atmospheric pressure

Which of the below is not one of the four basic forces?

• electromagnetic force

• momentum

• gravity

• nuclear force

Issac Newton said the force of gravity can be calculated between any two objects if their masses and the distance between them are known. This is known as____.

• The Theory of relativity

• Newton's 2nd law of motion

• The Law of Gravitation

• The law of terminal velocity

If you dropped a ping pong ball and a bowling ball at the same time in a vacuum (in the absence of air resistance), which ball would land first?

• The bowling ball

• the ping pong ball

• they would land at the same time

• they would land 9.8 m/s apart

Near Earth’s surface, acceleration due to gravity (g) is about 9.8 m/s². As you travel away from Earth’s surface, what happens to gravity (g)?

• it increases

• it decreases

• it stays the same

• It changes directions.