1D Kinematics & Free Fall

An object in free fall is acted on only by the force of gravity

• True

• False

Tags

NGSS.HS-PS2-4

A very massive object will free fall at the same rate of acceleration as a less massive object

• True

• False

Tags

NGSS.HS-PS2-1

If an object has an acceleration of 0 m/s2, then one can be sure that the object is not ___.

• moving

• changing position

• changing velocity

When a rock is dropped, it will accelerate downward at a rate of 9.8 m/s^2. If the same rock is thrown downward (instead of being dropped from rest), its acceleration will be ___.

Tags

NGSS.HS-PS2-1

In addition to time, which of the following must be used for a more complete description of the average acceleration of an object?

• Mass

• Displacement

• Velocity

• None of these

Tags

NGSS.HS-PS2-1

What is the acceleration of an object moving at constant velocity?

• 2 m/s²

• 1 m/s²

• 0 m/s²

• 0.8 m/s²

Tags

NGSS.HS-PS2-1

What is the difference between a vector quantity and a scalar quantity?

• A scalar has a magnitude and direction and a vector has only a magnitude

• A vector has a magnitude and direction and a scalar has only a magnitude

• A scalar has a direction and a vector has a magnitude

• None of the above

A baseball catcher throws a ball straight up and catches it in the same spot. A what point in the balls trajectory does it experience a velocity of zero.

• Midway on the way up

• At its peak height

• The instant it leaves the catchers hand

• The instant before it arrives in the catchers mitt

A ball is thrown straight up into the air. As the ball travels upward, the speed of the ball

• increases

• decreases

• stays the same

• behaves randomly

Tags

NGSS.HS-PS2-1

A BASE jumper jumps off a building. As the jumper falls downward, his speed will.

• increase

• decrease

• stay the same

• behave randomly

Tags

NGSS.HS-PS2-1