Rev. Kinematics

A quantity that is has magnitude and  direction is referred to as a

• vector quantity
• scalar quantity

An object can be moving for 10 seconds and still have zero displacement.

• True
• False

You run from your house to a friend's house that is 3 km away. You then walk home. The distance you traveled is 6 km. What is your displacement? 

• 6  km
• 0 km

A _________ quantity is completely described by magnitude alone. A _________ quantity is
completely described by a magnitude with a direction.

• vector, scalar
• scalar, vector

Speed is a __________ quantity and velocity is a __________ quantity.

• scalar, vector
• vector, scalar

An object is NOT accelerating if it is moving

• in a circle
• at constant velocity 
• at increasing speed
• only as influenced by gravity

Tags

NGSS.HS-PS2-1

A car slows down from +32 m/s to +8 m/s in 4 s. The acceleration is 

• 6 m/s/s opposite the motion
• 2m/s/s in the direction of motion
• 8 m/s/s opposite the motion

Tags

NGSS.HS-PS2-1

A cheetah travels 75 m in 3 s. What is her velocity over the interval?

• 225 m/s
• 25 m/s 
• 0.04 m/s

Tags

NGSS.MS-PS3-1

A cheetah travels 75 m in 3 s. Her velocity of 25 m/s over the interval is

• instantaneous
• average

the unit we measure time is in ___.

• m/s

• m

• m/s^2

• s