Gravity Basics

What force keeps us from floating away on Earth?

• Magnetic force

• Gravitational force

• Frictional force

• Electrical force

The gravitational force depends on:

• Shape and color

• Mass and distance

• Temperature and speed

• Volume and density

If you drop a stone and a ball together in a vacuum, which lands first?

• Stone

• Ball

• Both at the same time

• Neither

The greater the mass of an object, the __________.

• Stronger its gravity

• Weaker its gravity

• Faster it moves

• Lower its temperature

As two objects get closer, gravitational force:

• Weakens

• Remains constant

• Strengthens

• Disappears

Which of the following is created by gravitational attraction?

• Mass

• Weight

• Volume

• Density

Which unit measures the strength of gravity on Earth?

• Kilograms (kg)

• Joules (J)

• Newtons per kilogram (N/kg)

• Liters (L)

Who first explained the laws of motion and universal gravitation?

• Albert Einstein

• Galileo Galilei

• Sir Isaac Newton

• Nikola Tesla

On Earth, every 1 kg of mass weighs about:

• 1 N

• 6 N

• 10 N

• 100 N

An astronaut with a mass of 60 kg weighs how much on Earth?

• 60 N

• 600 N

• 100 N

• 360 N