What force is required to move 38,000kg. truck from 0km/hr to 60km/hr. in 20 seconds?

Question

Answer expressed in Newtons.

Answer 1

F = ma

F = m(Δv/Δt)

F = 38000(17-0/20)

F = 38000(17/20)

F = 3.2 x 10^4 N

Answer 2

F=ma
=m(v-v0)/t
=38000 kg(60 km/hr -0 km/hr)/20 s
=114, 000 kg*km/ (hr*s)
note that a newton is a kg*m/ s^2, so u have 2 do some unit conversions:
=114, 000 kg*km/ (hr*s) *(1hr/3600 s)(1000 m/km)
=31667 N