Question

A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of 400m in 20 s. Find its acceleration. Find the force acting on it if its mass is 7 tons
(Hint: 1 ton = 1000 kg.)

Answer 1

The truck starts from rest, so initial velocity u = 0
Distance s = 400 m, t = 20s
m = 7 tons = 7 × 1000 = 7000 Kg.
From 2nd equation of motion

From Newton’s 2nd law of motion, force acting on the Duck
= 7000 × 2
= 14000 N
= 1.4 × 10⁴ N.