Scalars and Vectors

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 lists is only vector quantities?

• energy, mass and force

• energy, mass and power

• velocity, force and acceleration

• velocity, power and acceleration

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

• A

• B

• C

• D

• A

• B

• C

• D

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