Question

A traction device employing three pullets is applied to a broken leg as shown in the sketch. The middle pulley is attached to the sole of the foot and a mass m supplies the tension in the ropes. Find the vaule of the mass m (in kg) if the force exerted on the sole of the foot by the middle pulley is to be 150N. (round off answer to nearest whole number)

Answer #1

What is the angle between the ropes ??

Anyway, I got an idea what this question is asking.

Note that tension will be same throughout the rope.

The sine components of tension in upper and lower rope will cancel out.

Only horizontal components will be added up

Let angle be

so,

F = 2Tcos

where F = 150 N and T = mg

so,

F = 2mgcos

m = F / 2gcos

m = 150 / 2 * 9.8 * cos

**just put the value of
given in the question and solve for m....too easy.**

**Please, Let me know if you have any doubt ( its pretty
simple and straight forward)**

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Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
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units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
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Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
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car? Report your answer to 1 decimal place. Please do not include
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Flag this Question
Question 210 pts
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