Question

Starting from a stationary position, Sachin paddles his bicycle to attain a velocity of 6

m/s in 10 s. Then he applies brakes such that the velocity of the bicycle comes down

to 4 m/s in the next 4 s. Calculate the acceleration of the bicycle in both the cases.​

Answer 1

Explanation:

For first case:

Initial velocity =0

Final velocity =60m/s

Time =30sec

v=u+at

6=0+a×30

6=30a

a=306=0.2

a=0.2m/s2

For second case:

Initial velocity =6m/s

Final velocity =4m/s

Time taken =5sec

v=u+at

4=6+a×5

4−6=5a

−2=5a

a=−52

a=−0.4m/s2