Physics Lecture Quiz

Why does the instructor suggest getting to know your classmates?

• They might help with homework.

• They could become future colleagues or employers.

• They can provide free tutoring.

• They might have the same major.

What is the net force on a Super Ball when it is held stationary?

• Equal to the force applied by the hand.

• Double the gravitational force.

• Equal to its weight.

• Zero, because it is not moving.

What happens to the net force on the Super Ball after it is released?

• It becomes zero.

• It becomes negative.

• It doubles.

• It equals the force of gravity.

According to Newton's Second Law, what does the net force on an object depend on?

• Its potential energy.

• Its velocity.

• Its mass and acceleration.

• Its position.

What is the force on the Super Ball at the top of its motion?

• Zero, because it is momentarily at rest.

• Equal to its weight.

• Equal to the force applied by the hand.

• Double the gravitational force.

What does the negative sign in Newton's Universal Law of Gravitation indicate?

• The force is repulsive.

• The force is attractive.

• The force is zero.

• The force is constant.

What is the universal gravitational constant denoted by?

• R

• M1

• G

• M2

How does gravity affect the formation of planets and stars?

• It repels them.

• It only affects stars.

• It pulls them together.

• It has no effect.

What happens if you are in space and throw a wrench away from you?

• You move in the opposite direction.

• You move in a random direction.

• You move towards the wrench.

• You stay still.

What did Newton's discovery about gravity reveal about our connection to the universe?

• We are isolated from the universe.

• We are connected through gravity.

• We are only connected to the Earth.

• We are connected through light.