A car is traveling at 20.0 m/s when the driver slams on the brakes and
brings it to a straight-line stop in 4.2 s. What is the magnitude of its
average acceleration?
Answers
Answered by
1
initial velocity, u = 20m/s
final velocity,v = 0m/s
time,t= 4.2 sec
we know that
v = u + at
0= 20+a*4.2
a = -20/4.2
a = - 10/2.1 = - 4.76 ms-2 ans
final velocity,v = 0m/s
time,t= 4.2 sec
we know that
v = u + at
0= 20+a*4.2
a = -20/4.2
a = - 10/2.1 = - 4.76 ms-2 ans
Answered by
0
a = v/t = -20/4.2 = -4.76 is the right answer
neosingh:
i took it minus only
negative hee to likha h
it comes from the eq v = u +at
i have shorcut method
to solve que fast
in exam
and anywhere
u know the concept but i think u will get zero marks if u write this solution
i thank you guys for a such helpful ....
but u got nedative marks to talk me such a way
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