PHYSICS

JAMB 2012 - Question 3

Physics 2012 JAMB Past Questions - Question 3: A load is pulled at a uniform speed along a horizontal floor by a rope is 1500N ,what is the frictional force on the load ?

Choose the correct answers from the options given.
A load is pulled at a uniform speed along a horizontal floor by a rope is 1500N ,what is the frictional force on the load ?
A:
B:
C:
D:
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Correct Answer

D

Explanation

the horizontal component of the force = 1500cos45degree = 1500x0.707 = 1060.65Nsince forces act in pairs this is the frictional force which opposes the motion
If a load is being pulled at a uniform speed along a horizontal floor, it means that the net force acting on the load is zero. In this case, the applied force (the force exerted by pulling with the rope) is balanced by the frictional force opposing the motion. So, the frictional force on the load is 1500 Newtons in the opposite direction to the applied force.

Therefore, the frictional force on the load is also 1500 Newtons, and it acts in the opposite direction to the force applied by the rope.