2-d motion formative

If an object is in free fall for three seconds, how fast will it be falling?

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 39.2 m/s

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-1

Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?

• the feather
• the metal bolt
• They would hit the ground at the same time.
• They would be suspended in a vacuum.

If a drone is flying at 15 m/s south and a headwind is blowing 5 m/s north, what is the resultant velocity of the drone?

• 20 m/s [S]

• 10 m/s [S]

• 10 m/s [N]

• 20 m/s [N]

Tags

NGSS.MS-PS2-2

If a paintbrush is dropped from the top of a building 200 meters tall, how long does it take to hit the ground?

• 6.39 seconds

• 40.77 seconds

• 20.39 seconds

• 4.52 seconds

Answer explanation

The paintbrush is in FREE FALL (vertical motion only).

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A city jogger runs 5.0 blocks due east and then 7.0 blocks due north. The magnitude of the jogger's displacement is ____ blocks?

• 8.6

• 12

• 24

• 74

If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement?

• 12 km
• 19 km, East
• 31 km
• 43 km, East

Two tennis balls are pushed horizontally off two buildings with the exact same height. Tennis ball A is pushed with more horizontal velocity than Tennis ball B. Which statement below accurately describes what happens?

• They hit the ground at the same time and Ball A has a greater range.

• They hit the ground at the same time and Ball B has a greater range.

• They hit the ground at the same time and with the same range.

• They don't hit the ground at the same time.

Tags

NGSS.MS-PS2-4

Two tennis balls are pushed horizontally off two buildings. Tennis ball A is pushed off a taller building than Tennis ball B. They are pushed with the same horizontal velocity. Which statement below correctly describes what happens?

• They both hit the ground at the same time with the same range.

• Ball A hits the ground first with greater range than Ball B.

• Ball B hits the ground first, but Ball A has greater range.

• We don't have enough information to compare them.

Tags

NGSS.MS-PS2-4