Vector Review

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 

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

In practice A of the figure, What is  the magnitude of the  resultant displacement?

• 5 km 
• 8 km
• 11 km
• 15 km

In practice A of the figure, what is the direction of the resultant displacement?

• 63 degrees, South of East
• 63 degrees, North of West
• 27 degrees, North of West
• 27 degrees, South of West

In practice B of the figure, which displacement is the horizontal component?

• 30 km, East
• 30 km, West
• 40 km, North
• 40 km, South

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

• Scalar
• Vector

Is this a scalar quantity or a vector quantity?
A deer running 15 meters per second due west

• Scalar
• Vector

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

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

In order to find the x-component of a vector with magnitute 7 m and angle 30° we will use the formula...

• cos (30)

• sin(30)

• 7*sin(30)

• 7*cos(30)