Question

A truck starts from rest and rolls down a hill with a constant acceleration. It

travels a distance of 400m in 20s. Find its acceleration. Find the force acting

on it if its mass is 7 tonne​

Answer 1

Answer:

so,

u velocity is =0(starts from rest)

distance =400m

time =20s

mass=7000kg (1 tonne is 1000kg)

acceleration =?

force=?

so, by using

S=ut+1/2at^2

400=0+20+1/2a(20)^2

400=1/2a×400

2/1a=400/400

a=1/2 m/s^2

so,acceleration is 0.5

then the

F=ma

F=7000×1/2

f=3500N

Hope it helps you