Question

6. A truck starts from rest and Rolls down a hill with a constant acceleration It travels
a distance of 400m in 20 second. find the acceleration? find the force acting on it if its
mass 7 tons?​

Answer 1

The truck starts from rest, so initial velocity = 0

Distance travelled = 400 m

Time taken = 20 s

We know the equation of motion, S = ut + ½ at2

400 = 0 + ½ a * (20)2

a = 2 m/s2

Now, mass = 7 metric tonnes

= 7 * 1000

= 7000 kg

So force = mass * acceleration

F = 7000 * 2

= 14000 N

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