Name: ________________________________ Date: _______ Period: _______
Gravity and Inertia Study Jams Video
Key Vocabulary: gravity, force, net force, inertia, gravitational force
Choose the best answer for the questions below. You may watch the video as
many times as you would like to answer the questions correctly!
1. Which of these can cause a moving object to change direction?
____ a. Inertia
____ b. Velocity
____ c. Force
____ d. Mass
2. What is gravitational force?
____ a. The force that keeps people from moving.
____ b. The force of attraction between any two objects.
____ c. The force that makes inert objects start moving.
____ d. The only force that changes an object’s velocity.
3. What is an object’s center of gravity?
____ a. The exact center of its mass.
____ b. The part that is closest to the Earth.
____ c. Any part of the object, as long as it has mass.
____ d. All of the above.
4. A paperclip and a computer are sitting on your desk. What is true about the gravitational force
of these two objects?
____ a. The paperclip attracts the computer with less gravitational force than the computer
attracts the paperclip.
____ b. The computer and the paperclip attract each other with equal gravitational force.
____ c. The computer attracts the paperclip with less gravitational force than the paperclip
attracts.
____ d. There is no gravitational force between the paperclip and the computer.
5. Why don’t we see the ground coming toward us?
____ a. We have less gravitational force than the Earth.
____ b. We have more inertia than the Earth.
____ c. We have less mass than the Earth.
____ d. We are already standing on the Earth.
6. Why doesn’t the moon crash toward the Earth’s surface?
____ a. It has very little inertia, so it stays in the sky and floats through space.
____ b. It has a lot of mass, so it feels the Earth’s gravitational force less than the smaller
objects do.
____ c. It has more mass than the Earth, so it stays in one place while Earth orbits it.
____ d. It is too small to fall through the Earth’s atmosphere and reach the Earth’s surface.
7. Why is it impossible to “defy gravity?”
____ a. There is no gravity.
____ b. You can’t defy gravity without going to another planet.
____ c. Gravitational force exists every place where there are two objects.
____ d. Nothing has enough force to resist gravity.
Newton’s First Law: Inertia
Key Vocabulary: force, friction, velocity, inertia, speed
Choose the best answer for the questions below. You may watch the video as
many times as you would like to answer the questions correctly!
1. While you’re ice-skating with your friends, you push off from one end of the rink and slide
forward. Based on Newton’s first law of motion, which is true?
____ a. You will lose your balance and fall over before you reach the middle of the ice rink.
____ b. You will continue to slide across the ice until a force makes you stop or change direction.
____ c. The force of gravity will make you keep your velocity until your friends make you stop.
____ d. The size of your ice skates will determine how quickly or slowly you travel across the ice.
2. How is velocity different from speed?
____ a. Velocity is when an object goes in reverse.
____ b. Velocity is the direction an object moves in, and has nothing to do with speed.
____ c. Velocity is speed and direction together.
____ d. Velocity is not at all different from speed.
3. What does friction do to a moving object?
____ a. Makes it rise.
____ b. Slows it down.
____ c. Speeds it up.
____ d. All of the above.
4. Your friend kicks a soccer ball, and it stops a few feet from you. What needs to happen in
order for it to return to your friends.
____ a. Friction has to be applied to the ball.
____ b. Force has to be applied to the ball.
____ c. Speed has to be applied to the ball.
____ d. Inertia has to be applied to the ball.
5. What is the relationship between heavy objects and inertia?
____ a. Only heavy objects have inertia.
____ b. Heavy objects have no inertia.
____ c. Heavy objects have less inertia.
____ d. Heavy objects have more inertia.
6. You are riding in the car with your grandfather, and he turns left. Why do you shift to the
right?
____ a. It takes you a moment to catch up with the new velocity of the car.
____ b. You have more inertia than the car, so it takes longer for you to turn left.
____ c. You had been sitting at rest until the force of the turn set you in motion.
____ d. The car continued in the same velocity, but you had a different inertia.
7. What does the second part of Newton’s first law say about objects at rest?
____ a. They cannot move unless they have a lot of friction.
____ b. If they are heavy, they will stay at rest, but if they are light, they will move.
____ c. They will stay at rest unless an outside force makes them move.
____ d. They have more inertia than the objects in motion.