Question

P = 12 kW
S = 4 metres
t = 20 secs
=
kg
​

Answer 1

P=12kw= 12000w

w=p×t=12000×20=240000J

a=v/t==s/t^2

4/400=10^-2m/s^2

w=F×d

F=w/d=240000/4

60000N

But F=m×a

so m=F/a=60000/10^-2

=60000×10^2

=6000000g

=6×10^6g