A truck of mass 8 metric tonnes starts
from rest and rolls down a hill with constant
acceleration. It travels a distance of 400 m in
20 s. Find its acceleration and force acting on
it. *
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Answer:
s=ut+1/2at²
400=1/2a×20²
800=a×400
∴a=2 m/s²
∴Force, F=ma
=8000×2
=16000 N
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