Question

Starting from rest Nikita Padals her bicycle to attain a velocity of 5m/so in 25 seconds then she applies break so that the velocity of bicycle comes down to the 4m/so in next 5 seconds calculate the acceleration of bicycle in both cases

Answer 1

1 st case:
Given,
Initial velocity=0m/s
Final velocity=5m/s
Time=25 sec
Acceleration=Final velocity -Initial velocity / Time
=5m/s-om/s / 25
=5m/s / 25sec
=1m/s / 5sec=0.2m/s²
2nd case:
Given,
Initial velocity=5m/s
Final velocity=4m/s
Time=5 sec
Acceleration=Final velocity-Initial velocity / Time
=4m/s-5m/s / 5sec
=-1m/s / 5sec=-0.2m/s²