Physics midterm

What is a vector?

• a quantity that has both magnitude and direction

• a quantity that only has direction

• a quantity that only has magnitude

Which diagram best shows person pushing a couch (accelerating) across the floor?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

The down-arrow in this diagram is most-likely:

• gravity

• normal

• a push or pull

• friction

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

What does the solid line on this graph represent?

• Constant speed

• Acceleration

• At rest

• deceleration

Tags

CCSS.8.EE.B.5

What is the line on this graph showing?

• moving away from starting point at a constant speed

• moving back towards the starting point at a constant speed

• acceleration (getting faster)

• deceleration (getting slower)

Tags

CCSS.HSF.IF.B.4

What happens to the velocity of a ball as it is dropped off a cliff?

• It decreases at a uniform rate

• It increases at a uniform rate

• It is constant

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A policeman traveling 19.5 m/s spots a speeder ahead, so he accelerates his vehicle at a steady rate of 1.81 m/s² for 3.2 s, at which time he catches up with the speeder. What distance does the police car cover in that time?

d = v_it + ½ at²

• 35.98 m

• 56.32 m

• 71.67 m

What is the velocity during the time interval t = 0 s to t = 2 s

• 6 m/s

• 3 m/s

• 2.5 m/s

Tags

NGSS.MS-PS3-1

In the Velocity - time graph, which time interval(s) is the object moving at constant speed?

• 0 to 3 seconds

• 3 to 5 seconds

• 5 to 11 seconds

• 11 to 14 seconds

Tags

NGSS.MS-PS3-1

The slope on a velocity - time graph represents the objects...

• speed

• position

• acceleration

• time