Question

a car of mass 100 kg initially moving with 50 m/s is applied some force such that it's speed. increase 100 m/s . determine the work done by driving force ​

Answer 1

WKT v^2=u^2+2×a×s

Where v,u are the initial and final velocities

And a,s is the acceleration and displacement

So substituting

150²=50²+2(a)(s)→(1)

WKT F=ma

⇒a=F/m⇒a=F/100 since mass=100kg

using equation 1

150²=50²+2(F/100)s

WKT work done=(F)(s)

so⇒150²=50²+2(W/100)

now solving for W we get

W= 1000000