Fred and George go to the gym. They both want to lift a 90 lbm weight using the

Question

Fred and George go to the gym. They both want to lift a 90 lbm weight using the pull-down pulley machine. George weighs 200 pounds, he sits on the seat and lifts the weight by pulling down on the bar with a constant force of 100 pounds. Fred only weighs 100 pounds. To raise the 90 lbm weight, Fred hangs from the bar. Which statement is true while the 90lbm weight is being accelerated upward? 4. Fred creates more tension in the cable than George. George creates more tension in the cable than Fred. They will both create the same tension in the cable. a. b. c. F 100 lb 90 130 bm om Fred George dwhen it hits the ground in each case.

Explanation / Answer

feel free to drop comment if you have any doubt.

For George, he is sitting on the chair and pulling down the rope with 100 lb force. here weight of george is not playing any role. So Tension in the cable will be equal to 100 lb.

For Fred, he is pulling down the rope with its weight. as his weight is 100 lbm so it is producing tension of 100 lb in cable.

so both producing the same amount of tension in the cable. Hence , OPTION C is correct.

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