A truck starts from rest and travels a distance of 400 m in 20s. Find the force, if its mass is 7 metric tonnes. (1ton=1000kg)
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Explanation:
Initial Velocity (u) = 0 m/s
Distance (s) = 400 m
Time (t) = 20 s
Mass (m) = 7000 kg
To find force we need to find acceleration.
We can find acceleration by the second law of motion,
s = ut + 1/2 at²
400 = 0 × 20 + 1/2 × a × (20)²
400 = 0 + 200a
a = 400/200
a = 2
Now, Force = Mass × Acceleration
F = 7000 × 2
Force = 14000
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