Kinematics

A quantity that is ignorant of direction is referred to as a

• vector quantity
• scalar quantity

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

• scalar, vector
• vector, scalar

What is the formula to calculate speed?

• S = t/d
• S = d/t
• S = d x t
• S = t x d

Tags

NGSS.MS-PS3-1

A change in velocity over time is known as:

• acceleration
• constant speed
• average speed
• displacement

Tags

NGSS.HS-PS2-1

The fastest trains are magnetically levitated above the rails to avoid friction (and are therefore called
MagLev trains...cool, huh?). The fastest trains travel about 250 km in a half an hour. What is their
average speed in km/hour?

• 250 km/hr
• 500 km/hr
• 125 km/hr

A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be:

• 19.6 m/s
• -5.4 m/s
• -44.6 m/s
• 44.6 m/s

Tags

NGSS.HS-PS2-1

It's the change of position, from the starting point to the ending point, it always has direction.

• Distance

• Displacement

• Speed

• Velocity

An object  accelerates at 2  m/s^2. Assuming the object starts from rest, how much time does it need to accelerate to a speed of 16  m/s?

• 4 s
• 8 s
• 16 s
• 1/16 s

Tags

NGSS.HS-PS2-1

A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s², what is its velocity after 2 s?

• 0 m/s
• 0.5 m/s
• 1 m/s
• 1.5 m/s

Tags

NGSS.HS-PS2-1

How much time would it take for an object to fall 4.7 meters?

• 0.959 s
• 4.79 s
• 0.979 s

Tags

NGSS.HS-PS2-4