BrainPop

The moon's gravity is one-sixth of Earth's gravity. If you weigh 100 Newtons on Earth, how much do you weigh on the moon?

16.667 newtons

Which of these would have the strongest gravitational pull?

A large, dense star

What is gravity?

A type of force

According to Einstein, gravity:

Bends space and time

Which two components must a vector quantity have?

Direction and magnitude

If you drop an egg off of the Empire State Building, which of the following things will happen first?

Drag will increase

What effect does the moon's gravity have on the earth?

It causes the tides

According to Sir Isaac Newton, gravity depends on two factors. What are they?

Mass and Distance

What does the measurement unit N stand for?

Newton

Why is the earth's gravity stronger than the moon's gravity?

The earth is more massive than the moon

What can you infer about an object moving at a constant velocity?

The forces acting on it are in balance

If the net force on an object is zero, what can you conclude?

The object is not accelerating

According to Newton's laws, what might happen to the earth if its orbit moved farther away from the sun?

The sun's gravitational pull on the earth would decrease

How does the sun's gravity compare to the earth's gravity?

The sun's gravity is stronger

What theory did Albert Einstein introduce to challenge Newton's ideas?

The theory of relativity

What is true of non-contact forces?

They become weaker with distance

What is true about all forces?

They involve more than one object

Acceleration occurs when an object is subjected to a(n):

Unbalanced force

Which of the following statements is always true?

Unbalanced forces lead to a change in speed or direction

Which one of these arrows best corresponds to the force of drag?

arrow going to the left