Physics, asked by bnpair12345, 1 year ago

find acceleration if u=72 km/h
v=36 km/h and t=2 sec
I want the answer in km/h sq
and in full explanation

Answers

Answered by sumansingh390

V=36km/h

V=36*5/18=10m/sec

U=72*5/18=20m/sec

now,A=V-U/T

=10-20/2m/sec

=-10/2m/sec

=-5m/sec

again,A=-5m/sec

=-5*18/5km/h

=-18km/h

bnpair12345: sorry this is wrong answer

sumansingh390: how ??

sumansingh390: explian it..

bnpair12345: acceleration unit is m/s^2

bnpair12345: so ur conversion is wrong

bnpair12345: when you convert m/s^2 into km/h^2 u have to × by 60 ×60×60×60÷1000 after cancellation u will get 6×6×6×60

bnpair12345: hope u dont need further explanation

Answered by beingankitaa

we know,

acceleration is the rate of change of velocity with respect to time.

Here,t =2 second = 2/3600 =0.005 hr

so.....we can write,

acceleration = V_-_u

= 36_-_72

0.005

= -36 / 0.005

= 7200 km/hr^2

bnpair12345: this is wrong

bnpair12345: the correct answer is 648000 km/h^2

bnpair12345: the conversion to decimal is wrong and unnecessary

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