Forces Pre Assessment

What causes a change in an object's motion?

• Balanced forces

• Acceleration

• Unbalanced forces

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

In the picture, what force is acting upward on the skydiver?

• Gravity

• Air resistance

In the picture, what force is acting downward on the skydiver?

• Gravity

• Air resistance

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A cyclist rides north past an old man sitting on a bench. What direction will the cyclist see the old man moving? Assume that the old man is sitting still.

• North

• South

• East

• West

• The old man will not appear to be moving

What would be a good reference point to describe the motion of the Earth within our solar system?

• The sun

• The Earth

• The mountains on Earth

• The Milky Way

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

What makes a good reference point?

• Something that is in constant motion

• Something that is acceleration

• Something that is stationary (not moving)

• Something that is decelerating

What is the Net Force on the box shown below?

• 12N upward

• 12N downward

• 23N to the right

• 17N to the left

• 17N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the Net Force on the box shown below?

• 100N upward

• 150N left

• 0N

Tags

NGSS.MS-PS2-2

During a baseball game, a hitter strikes the ball with a bat. When this happens, the ball and the bat exert a force on each other. Why does the ball accelerate away from the bat more than the bat accelerates away from the ball?

• The ball has greater velocity before the collision, so the force affects the ball more than it affects the bat.

• The bat exerts more force than the ball because the batter is exerting a force on the bat as it hits the ball.

• The ball has less mass, so the equal force on the ball and the bat causes greater acceleration of the ball.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A person is staying in the middle of a boxcar on a train moving 100km per hour (see image). If the motion of the boxcar remains constant, where in the boxcar will the person most likely land after he jumps straight up?

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Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2