Question

Answer the questions below related to velocity

Answer 1

1.

Speed:

• Distance covered in per unit time is called speed.
• Speed is a scalar quantity
• It can never be zero

Velocity:

• Displacement produced in per unit time is called velocity
• Velocity is a vector quantity
• It can be zero

2.

a) As the girl returns to the initial position and the displacement becomes 0, average velocity is 0

b) If the girl stops halfway then the displacement becomes equal to the diameter of the circle

$displacement = 10m$

So,

Average velocity=

$\frac{displacment}{time}$

$= \frac{10}{400}$

$= 0.025m/s$