Question

At t = 60, the car slows down with a constant deceleration.
This deceleration is half of the acceleration between t = 0 and t = 20.
During this period of deceleration, calculate the value of t when the car has a speed
of u/4 metres per second.
Attachment below.

Answer 1

ur doing cambridge? right

Answer 2

Yep!

Answer 3

http://openstudy.com/users/thushananth01#/updates/4f817264e4b0505bf0833f20

Answer 4

Thank you!

Answer 5

which country r u in

Answer 6

v=u+at

Between time t= 0 to t=20 sec
u=0 + a1 (20) .........(1)

Beyond time t=60 sec,
u/4 = u - a2 (t) ..........(2)

Substituting a2 = a1/2