Question

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

Answer 1

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Answer 2

Dear Student,

◆ Answer -

a = 2 m/s²

F = 14000 N

● Explaination -

# Given -

m = 7 tonnes = 7000 kg

t = 20 s

s = 400 m

# Solution -

As truck starts from rest, u = 0 m/s.

s = ut + 1/2 at²

400 = 0×20 + 1/2 × a × 20²

400 = 200a

a = 400/200

a = 2 m/s²

Force acting on the truck is -

F = ma

F = 7000 × 2

F = 14000 N

Hope this helps you...