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Q.

Two physicists both of mass 50 kg, climb up identical ropes suspended from the ceiling of a gymnasium. The ropes are 15 m long. Physicist 1 reaches the top twice as quickly as physicist 2 does. After physicist 2 also reaches top, they argue about who did more work against gravity. No one did slip during climb.
Physicist-1
“I did more work fighting gravity, because I was overcoming gravity more quickly. Your climb was lazier, and therefore, you did less work.”
Physicist-2
“No way. I did more work fighting gravity, because I spend more time climbing the rope. Since we both ended up at the same height, but I spent more time getting there, I had to work harder.”
Q. The correct statements among the following
    while climbing from the floor to the ceiling?
 

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a

Physicist 1 did more work against friction 

b

Physicist 2 did more work against gravity

c

The work done by friction on both Physicists same and non zero

d

The work done by friction on both Physicists is zero

answer is D.

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