Based on Newton’s first law of motion, what happens when you slide forward on ice?

• You will lose your balance and fall over before you reach the middle.

• You will continue to slide until a force makes you stop or change direction.

• Gravity keeps you moving until someone makes you stop.

• The size of your ice skates affects your speed across the ice.

How is velocity different from speed?

• Velocity is when an object goes in reverse.
• Velocity is the direction an object moves in, and it has nothing to do with speed.
• Velocity is speed and direction together.
• Velocity is not at all different from speed.

What does friction do to a moving object?

• slows it down

• speeds it up

• makes it rise

• all of the above

What needs to happen to a soccer ball for it to return to someone?

• Friction has to be applied to the ball.

• Force has to be applied to the ball.

• Speed has to be applied to the ball.

• Inertia has to be applied to the ball.

What is the relationship between heavy objects and inertia?

• Only heavy objects have inertia.
• Heavy objects have no inertia.
• Heavy objects have less inertia.
• Heavy objects have more inertia.

You are riding in the car with your grandfather, and he turns left. Why do you shift to the right?

• It takes you a moment to catch up with the new velocity of the car.
• You have more inertia than the car, so it takes longer for you to turn left.
• You had been sitting at rest until the force of the turn set you in motion.
• The car continued in the same velocity, but you had a different inertia.

What does the second part of Newton’s first law say about objects at rest?

• They cannot move unless they have a lot of friction.
• If they are heavy, they will stay at rest, but if they are light, they will move.
• They will stay at rest unless an outside force makes them move.
• They have more inertia than objects in motion.

Your neighbor is riding her bike around the block. When she slows down and turns a corner, what changes about her?

• her velocity
• her friction
• her speed only
• her balance

What is the rate at which an object’s velocity changes called?

• inertia

• actualization

• acceleration

• completion

What is inertia?

• the amount of force to start moving an object at rest

• an object’s velocity and its friction

• what keeps an object steady, at rest or moving consistently

• the friction needed to slow an object in motion