GRAVITY

What is the force that pulls us back to the earth called?

• Friction

• Magnetism

• Pressure

• Gravity

Who discovered gravity about 300 years ago?

• Albert Einstein

• Nikola Tesla

• Sir Isaac Newton

• Galileo Galilei

Why does a stone fall faster than a piece of paper?

• Because it is heavier

• Because of its color

• Due to its mass

• Because of its shape

How much would a person weighing 150 pounds on earth weigh on the moon?

• 25 pounds

• 50 pounds

• 100 pounds

• 75 pounds

An astronaut with a mass of 65kg travels to the moon. The moon's gravitational field strength is 1.6 N/kg. Calculate his weight on the moon.

• 40N

• 67.1N

• 104 N

• 68N

What keeps the planets orbiting around the sun?

• Magnetic force

• Wind

• Gravitational pull

• Friction