Question

Mohit and rahul are standing 10 m apart. they are holding a taut rope at one end each. to meet, each person pulls the rope until they meet when rahul has moved m from his starting position. if mohit says his weight is kg, then rahul should say his weight as:

A) 2m kg

B) m kg

C) m/2​ kg

D) 4m kg

Answer 1

We can see here that Rahul's weight (force) is 'm' kg. Hence, the correct answer is: B) m kg

How we arrived at the solution

Given that the total distance between Mohit and Rahul is 10 meters and Rahul moves 'm' meters after they meet, Mohit would have covered (10 - m) meters.

When two people are pulling a rope, the tension or force exerted on both ends of the rope is equal. Assuming the tension is directly proportional to the force or weight each person applies to the rope:

If Mohit says his weight is 'W' kg, then the force he applies to his end of the rope is 'W' kg.

Rahul, who has moved 'm' meters, must have applied a force that is equal to the force applied by Mohit to meet.

So, the force applied by Rahul = Mohit's force = 'W' kg.

Now, Rahul's force = 'W' kg = m meters

Therefore, Rahul's weight (force) is 'm' kg.

Hence, the correct answer is: B) m kg