Question

In: Physics

A 300 kg piano is being lowered into position by a crane while two people steady...

A 300 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob's rope pulls to the left, 11 ∘ below the horizontal, with 330 N of tension. Ellen's rope pulls toward the right, 28 ∘ below the horizontal.

Part A

What tension must Ellen maintain in her rope to keep the piano descending vertically at a constant speed?

Express your answer in newtons.

Part B

What is the tension in the vertical main cable supporting the piano?

Express your answer in newtons.

Expert Solution

Since the pulling Forces are actin at angles,we have to resolve them into their components.

Part A

What tension must Ellen maintain in her rope to keep the piano descending vertically at a constant speed?

So the piano should not veer(change direction) right or left.It should descend vertically downwards.

That means Net force along horizontal direction must be zero(balanced).

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ANSWER:

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Part B

What is the tension in the vertical main cable supporting the piano?

Given the piano should descending vertically at a constant speed.

So acceleration in vertical direction is Zero

Net Force =Mass*acceleration =0

Net Force =Zero

Consider Forces in y direction

ANSWER:

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genius_generous answered 6 months ago

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