A body of mass 20 kg is pulled by a rope of length 8 m on a surface by a force of 48 N applied at the other end. The force that is acting on 20 kg body, if the linear density of the rope is 0.5 kg/m will be
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A body of mass 50 kg is pulled by a rope of length 8 m on a surface by a force 108 N applied at the other end. The linear density of the rope is 0.5 kg/m. The force acting on 50 kg mass is
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The correct answer is B.
Mass of the rope =8×
2
1
=4kg
Total mass=50+4=54kg
a=
m
f
=
54
108
=2m/s
2
Force utilised in pulling the rope = 4×2
Force applied on the mass = 108−8=100N
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