Question

a truck starts rest and rolls down a hill with a constant acceleration it travels a distance of 400m in 20s find the force acting on it if its mass is 7 metric tonnes​

Answer 1

Answer:

14000 N

Explanation:

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

Answer 2

Answer:

u= 0

s= 400m

t= 20s

s=ut+1/2at2

400= 0+1/2a×400=200

a=3ms-2

f=ma=7000×2

14000n

Explanation:

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