Question

8000 kgs vehicle moving with a speed of 20 metre per second is brought to rest in a distance of 50 metres find the acceleration calculate the unbalanced force acting on the vehicle

Answer 1

Answer:

Mass (m) = 8000 kg

Initial Velocity (u) = 20 m/s

Final Velocity (v) = 0 m/s (since it is coming to rest)

Distance (s) = 50 m

v^2 = u^2 + 2as, where, acceleration = a

0 = (20)^2 + 2(a)50

0 = 400 + 100a

-400 = 100a

a = -400/100

a = -4 m/s^2

f = m.a, where Force = f

= 8000 ( -4)

= -32000 Newton

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