Kinematics and Freefall Review

Acceleration only takes place when things speed up. 

• True
• False

Tags

NGSS.HS-PS2-1

If you throw a baseball straight up, what is its velocity at the highest point?

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

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

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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

A _________ quantity is completely described by magnitude alone (such as speed). A _________ quantity is

completely described by a magnitude with a direction (such as velocity).

• vector, scalar

• scalar, vector

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

Tags

NGSS.HS-PS2-1

How much time would it take for an object to fall from rest a distance of 4.7 meters?

• 0.959 s

• 4.79 s

• 0.979 s

Tags

NGSS.HS-PS2-1

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