Acceleration only takes place when things speed up. 

• True
• False

Tags

NGSS.HS-PS2-1

Objects that are only under the influence of gravity are considered to be  ____

• in freefall
• flying
• in freefall only if they are moving downwards

Tags

NGSS.HS-PS2-4

A problem that asks "how long did it take" is prompting you for an answer measured in

• distance in meters.

• velocity in meters / second.

• acceleration in meters / second^2.

• time in seconds.

A problem that asks "how far did the object move?" is prompting you for an answer measured in

• distance in meters.

• velocity in meters / second.

• acceleration in meters / second^2.

• time in seconds.

A dog running with an initial speed of 7.5 m/s comes to a stop in 5 seconds. What is the dog's displacement?

• 0 m

• 7.5 m

• 37.5 m

• 18.8 m

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

Tags

CCSS.7.RP.A.2B

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

Tags

NGSS.HS-PS2-1

Which would fall with greater acceleration in a vacuum-a feather or a hammer?

• feather

• hammer

• they accelerate at the same rate

• is the vacuum turned on?

Tags

NGSS.HS-PS2-1

The unit for speed is:

• m

• m/s

• m/s²

• s

Tags

NGSS.HS-PS4-1

Terry dropped a pebble from the top of his apartment building. The pebble impacted the ground after falling for 2.2 seconds. Calculate the height of the apartment building.

• 21.5 m

• 10.8 m

• 47.4 m

• 23.7 m

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4