Question

please solve this question​

Answer 1

It means that body can change its position only in rest.

Answer 2

Answer:

0.2 m/s²,0.4 m/s²

Explanation:

acceleration of bycycle :

initial velocity of bycycle = 0

final velocity  = 6m/s

time taken to accelerate= 30 s

therefore ,

acceleration = (6-0)/30

a =  0.2m/s²

deacceleration of bycycle from 6 m/s to 4 m/s

initial vwlocity=6m/s

final velocity= 4 m/s

time taken to de accelerate= 5s

acceleration= (4-6)/5 m/s²

a= -0.4 m/s²

or deacceleration at 0.4 m/s²