Kinematics Equations & Freefall Review

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 to solve for:

• "delta x" 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 duringt that time?

• 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 coaster accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s in 4.0 seconds.  What's the acceleration of the coaster?

• 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 (with no air): a feather or a hammer?

• feather

• hammer

• they accelerate at the same rate

• is the vacuum turned on?

Tags

NGSS.HS-PS2-1

A ball is thrown straight up into the air at 20.0 m/s. What is its velocity at its highest point?

• 0 m/s

• -9.81 m/s

• 20 m/s

• -20 m/s

A ball is thrown straight up into the air at 20.0 m/s. What is its velocity as it returns to its initial height?

• 0 m/s

• -9.81 m/s

• 20 m/s

• -20 m/s

Tags

NGSS.HS-PS2-4