Vectors and scalars

Which of the following is a vector quantity?

• energy

• velocity

• mass

• time

Which of the following lists of physical quantities consists only of vectors?

• acceleration, force, volume

• mass, velocity, acceleration

• time, mass, velocity

• velocity, acceleration, force

Which of the following is a scalar quantity?

• The braking force needed to stop a car

• The effort needed to hammer a nail into some wood

• The heat needed to boil some water

• The thrust needed to lift a rocket off the ground

A vector contains more information than a scalar. What is the extra information?

• acceleration

• direction

• resultant

• size

An ant on a picnic table travels 30 cm east, then 25 cm north and finally 15 cm west. What is the magnitude of the ant's displacement relative to its original position?

• 29 cm

• 70 cm

• 57 cm

• 52 cm

If two forces of 20 N towards north and 12 N towards south are acting on an object. What will be the resultant force?

• 32 N North

• 20 N South

• 32 N South

• 8 N North

A boy pushes against a wall with a 60 N force and the wall does not move. What is the resultant force?

• 60 N

• -60 N

• 0 N

• 30 N

For the resultant of two vectors to be maximum , the angle between them should be:

• 0^o

• 60^o

• 90^o

• 180⁰

Spot the odd one out

• velocity
• speed
• mass
• length
• distance

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