Forces and Motion

A baseball pitcher throws a baseball. It does not reach the catcher. What should the pitcher do to make a ball reach the catcher?

• Increase the force used when throwing the ball

• Decrease the force used when throwing the ball

• Reduce the gravity exerted on the ball

• Increase the gravity exerted on the ball

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Why does a newly oiled machine work faster than a machine that hasn't been oiled?

• Oil reduces the friction between the parts

• Oil increases the friction between the parts

• Gravity acts more on an old machine

• Gravity acts more on a new machine

This game of tug of war is an example of _________ forces.

• unbalanced

• balanced

• potential

• net zero

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What will the net force on the soccer ball be?

• 50 N to the left

• 50 N to the right

• 200 N to the left

• 200 N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force on the car?

• 400 N forward (left)

• 0 N (balanced forces)

• 200 N forward (left)

• 200 N backward (right)

Tags

NGSS.MS-PS2-2

What effect does friction have on a moving object?

• it causes the moving object to slow and eventually stop

• it causes the moving object to speed up

• it keeps the moving object moving in the same direction forever

• it causes the moving object to turn around and move in the opposite direction

Tags

NGSS.MS-PS3-5

What is the net force?

• zero N

• 10 N

• 77 N

• 13 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A force that opposes motion is

• friction

• inertia

• acceleration

• momentum

Tags

NGSS.3-PS2-1

Are unequal forces that cause a change in the motion of an object

• Balanced forces

• Unbalanced forces

• Inertia

• Gravity

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2