Question

If car weighing 1200 kgs is uniformly accelerated from rest and covers a distance of 40 metre in 5s. Calculate the work the car engine had to do during this time

Just say if this method is right and if wrong plz send the right method...

m=1200kg
u=0
s=40m
t=5s
v=s/t
=40/5
=8m/s
W=Kinetic energy
KE=1/2mv^2
=1/2*1200*8*8
=600*64
=38400J


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Answer 1

Answer:

this is absolutely right ....