RHS Freefall only

Which statement is true about objects in freefall?

• Objects fall a greater distance each successive second.
• Objects fall with a constant velocity.
• Objects fall with the same distance each successive second.
• Heavier objects fall faster than light objects.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Bucky wishes to launch a ball into the air for a time of 3.0 s for the entire trip.  What speed should she launch the ball with?

• 10m/s²
• 30m/s
• 15m/s
• 10m/s

Tags

NGSS.HS-PS2-1

A ball is thrown straight up. At the top of the path the acceleration is...

• -10m/s²

• 0m/s²
• -20m/s²

• dependent on how long it ha been in the air. 

Tags

NGSS.HS-PS2-1

A freely falling object starts from rest, after falling for 15s it will have a speed of about...

• 750m/s
• 15m/s
• 150m/s
• 75m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball is thrown straight up. At the top of its path its instantaneous speed is...

• about 5m/s
• about 10 m/s
• about 20m/s
• 0m/s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

A ball tossed vertically upward rises, reaches it highest point, and then falls back to its starting position. During this time the acceleration of the ball is always

• directed downward
• in the direction of motion
• directed upward
• opposite of its velocity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A ball is thrown upwards and caught when it returns to the same height. The speed of the ball when caught would be

• the same as when it was thrown
• more than when it was thrown
• less than when it was thrown
• unknown

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

In the absence of air resistance, objects fall at constant

• velocity
• acceleration
• speed
• distance

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If you drop a feather and a coin at the same time in a vacuum tube, which will reach the bottom of the tube first?

• the coin
• the feather
• neither, they will both hit at the same time
• it depends on the length of the tube

Tags

NGSS.HS-PS2-4

Kathy dropped a pebble from the deck of a bridge. The pebble impacted the river under the bridge after falling for 3.8 seconds.  Calculate the height of the bridge over the river.

• 36.1 m

• 72.2 m

• 144.4 m

• 18.1 m

Tags

NGSS.HS-PS2-1