Forces and motion 5.6

Question 1

Does a distance require a specific direction? i.e Is it a scalar or vector quantity?

Answer 1

No specific is required, so it is a scalar quantity

Question 2

If an object moves 3 metres to the left and then 3 metres back to its initial position, what is the objects total displacement?

Answer 2

• The object has zero displacement
• Displacement is a vector quantity, so it also involves direction
• The object starts and ends at the same point

Question 3

State a typical value for the speed of sound

Answer 3

330 m/s