Forces Unit Review

Newton’s first law of motion is also called the law of ________?

• Mass
• Inertia
• Force
• Velocity

Slamming on the brakes in a moving car makes a passenger move forward against his or her seat belt because

• the passenger has the inertia to keep moving forward
• the passenger is being pushed by the seats of the car
• the passenger is better able to stop themselves in this manner
• the passenger has an equal and opposite force supporting their weight

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How long will an object remain at rest, according to Newton's First Law of Motion?

• it can't rest
• until noon
• until an unbalanced force occurs
• as long as there are unbalanced forces acting on it 

For every _______ there is an equal and opposite ________. 

• reaction, action
• action, action
• reaction, reaction
• action, reaction

Tags

NGSS.MS-PS2-1

Which of these is an example of Newton's First Law, inertia?

• pushing against a brick wall, and the brick wall does not move
• pushing against a stationary wheelbarrow, and the wheelbarrow accelerates forward
• pushing a wheelbarrow full of bricks, and the bricks slide back toward the handles
• pushing a wagon to the top of a hill, and the wagon to the top of hill and the wagon accelerates down the hill without assistance

You are sitting in a car that isn't moving; the car accelerates. Your body is pushed back. Explain. 

• newtons
• vector
• inertia
• gravity

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NGSS.MS-PS2-2

Why is it harder to push a van filled with bowling balls than it is to push a van with basketballs?

• The mass of the car is greater than the mass of the basketballs
• The mass of the bowling balls is greater than the mass of the basketballs
• The van with the basketballs is bigger than the van with the bowling balls
• It should be equally as hard to push the two vans

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NGSS.MS-PS2-2

You are holding a bowl of hot soup while standing in the kitchen. As you begin to move, the soup spills out of the bowl. Upon reflection you realize that

• the soup spilled because of air resistance
• if you had traveled faster this wouldn't have happened
• the soup wanted to stay where it was, but you moved the bowl
• the soup and the bowl act as one body with the same velocity

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NGSS.HS-PS2-1

Which of these is an example of Newton's Second Law, F=ma

• a tug of war where both sides pull equally, and the rope doesn't move
• a wide receiver using his hands to stop and catch a football thrown by the quarterback
• a car traveling on a straight part of the highway with a cruise control set at constant velocity

• a book pushing down on the desk where it is resting

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NGSS.MS-PS2-2

Why do you lean towards the left when a car turns right

• because of inertia
• because of gravity
• because of buoyancy
• because of velocity