A truck starting from rest & rolls down from hill with constant acceleration. It travels a distance of 400m in 20s . Find the acceleration & also force acting on the mass of 7 metric tons.
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Answer:
metric ton = 1000 kg
7 metric ton = 7 × 1000 = 7000 kg
∴ Mass (m) = 7000 kg
We know the formula
s=ut+12at2
Substitute the given parameters in the above equation
400 = 0 + ½ a (20)2
400 = a × 400/2
400 = 200 × a
a = 2 m/s2
Acceleration is equal to 2 m/s2
Force (F) = Mass (m) × Acceleration (a)
Substitute the values of mass and acceleration in the above equation, we get
F = 7000 × 2
F = 14000 N
Answer
The force acting on it if its mass is 7 metric tons is 14000 N
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