Answer:
Case:1 a) average speed
Since the body returns to its initial position hence the displacement is zero so velocity is also zero.
CASE: 2 a) average speed
Since the body returns to its initial position hence the displacement is zero so velocity is also zero.
Explanation:
Given:
Case: 1
speed of Wilma from point A to B,
speed of Wilma from point B to A,
Let the displacement from A to B be x meter.
Then the total displacement = 2x meter
time taken in going from A to B:
time taken in going from B to A:
<u>Wilma's average speed over the entire trip:</u>
- Since the body returns to its initial position hence the displacement is zero so velocity is also zero.
CASE: 2
speed of Wilma from point A to B,
speed of Wilma from point B to A,
Let the displacement from A to B be x meter.
Then the total displacement = 2x meter
time taken in going from A to B:
time taken in going from B to A:
<u>Wilma's average speed over the entire trip:</u>
- Since the body returns to its initial position hence the displacement is zero so velocity is also zero.