Question

21. Give one example each type of motion when:-
a) Acceleration is +ve.
b) Acceleration is -ve.
c) Acceleration is zero.​

Answer 1

Explanation:

Example

a) when a car moving with increasing speede has positive accleration.

b) When that car braking(stopping) then its speed decreasing then it has negative acceleration.

c) When rainfall occurs in rainy day it freely fall under gravity with constant accleration that is zero acceleration.

Thank you

Answer 2

Explanation:

a. when the car is moving with positive velocity .

b. When the car is moving with decrease in velocity.