A car decelerates from 100m/s to 60m/s in time t and the distance covered is 200m. Find the time t.
Answers
Answered by
9
u=100m/s
v=60m/s
S=200m
v^2-u^2=2aS
(60)^2-(100)^2=2a(200)
3600-10000=400a
-6400/400=a
-16m/sec^2=a
now time=
v=u+at
60=100+(-16)t
60-100=-16t
40=16t
t=40/16
t=5/2sec or 2.5 sec
v=60m/s
S=200m
v^2-u^2=2aS
(60)^2-(100)^2=2a(200)
3600-10000=400a
-6400/400=a
-16m/sec^2=a
now time=
v=u+at
60=100+(-16)t
60-100=-16t
40=16t
t=40/16
t=5/2sec or 2.5 sec
Answered by
0
Answer:
t=2.5s
Explanation:
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