Forces and Motion Review

What will happen to the cart in the illustration?

• It will stand still.
• It will move at constant velocity.
• It will accelerate to the right.
• It will accelerate to the left.

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NGSS.MS-PS2-2

NGSS.MS-PS2-1

Unbalanced forces cause an object to _____.

• remain motionless
• move at constant velocity
• speed up, slow down, or change direction

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NGSS.MS-PS2-2

In order for a helicopter to hover in place, which statement must be true?

• The upward force is greater than the downward force.
• The upward force is lesser than the downward force.
• The upward force is exactly the same as the downward force.
• There are no forces acting on the helicopter.

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NGSS.MS-PS2-2

Newton's First Law of Motion is also known as the Law of _____.

• Inertia
• Conservation of Mass
• Action and Reaction
• Mass and Acceleration

When a magician yanks the tablecloth off of a table without knocking over the dishes on the table, he's demonstrating Newton's _____ Law of Motion.

• 1st
• 2nd
• 3rd
• 4th

Newton's Second Law of Motion says that if you want to increase the acceleration of an object, you have to _____.

• increase the unbalanced force
• decrease the unbalanced force
• increase the object's mass
• make sure all forces are balanced

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NGSS.MS-PS2-2

"Terminal velocity" is the velocity at which _____

• air resistance is less than weight
• air resistance is equal to weight
• air resistance is greater than weight
• you'd die if you hit the ground

How does a parachute help a skydiver land safely?

• It increases his terminal velocity by decreasing his air resistance.
• It increases his terminal velocity by increasing his air resistance.
• It decreases his terminal velocity by decreasing his air resistance.
• It decreases his terminal velocity by increasing his air resistance.

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NGSS.MS-PS2-4

NGSS.MS-PS3-5

Is this statement TRUE or FALSE: If the forces acting on an object are balanced, the object CANNOT be moving.

• TRUE
• FALSE

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NGSS.MS-PS2-2

Newton's Third Law says that forces _____.

• always come in equal and opposite pairs
• always come in groups of three
• are always balanced
• are never balanced

Tags

NGSS.MS-PS2-1