one dimensional motion

A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south.  What is the magnitude and direction  of the car's resultant displacement?  

• 40 metres, South
• 50 metres, South
• 50 metres, North
• 40 metres, North 

Is this a scalar quantity or a vector quantity?
Wind blowing at 20 knots

• Scalar
• Vector

Tags

NGSS.MS-PS2-2

If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement?

• 20m
• 40m
• 0m
• -20m

A car moved 60 km East and 90 km West. What is the distance it traveled?

• 30 km, West
• 60 km. East
• 90 km
• 150 km

If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement?

• 12 km
• 19 km, East
• 31 km
• 43 km, East

An airplane traveling north at 220 meters per second encounters a 50.0-meters-per-second crosswind from west to east. 

• 170 m/s
• 214 m/s
• 226 m/s
• 270 m/s

Tags

NGSS.HS-PS2-1

Which statement describes a vector?

• It has magnitude but no direction
• It has direction but no magnitude
• It has both direction and magnitude
• It has constant magnitude but no
   direction

What is the unit for acceleration? 

• m/s
• ms
• m/s/s
• mss

Which of the following quantities are vectors?

• speed, velocity, acceleration
• velocity, acceleration, force
• force, acceleration, mass
• length, mass, time

The speedometer on your car tells you

• average velocity
• instantaneous velocity
• average speed
• instantaneous speed