Grade 12th passModern Physics

a. How much work do you do on the bucket in pulling it up ? B. How much work does gravity do on the bucket ?

Question image for a. How much work do you do on the bucket in pulli

Emmanuel120

7 Years agoGrade 12th pass

3 Answers

Agrata Singh

Approved Tutor Answer7 Years ago

Hey I am attaching the solution below. Hope this helps you. In case of any further query feel free to ask.

Emmanuel120

7 Years ago

Cause I can’t view it Waiting for your solution , I can’t open your image

Have you send the solutions ?

Agrata Singh

7 Years ago

Well then I can type it out for you

Only two forces act on the bucket, the tension applied by you through the rope(T) and weight of bucket(W)

Since the bucket moves up very slowly accn=0

T=W=mg

Now T is applied in upward dirxn so work done by T is positive and equal to W=mgd where d is the distance moved by the bucket. Putting in the values W=270 J

Similarly gravity force is applied in opposite direction of displacement so work done is negative. W=-mgd

Putting in the given values W=-270J

Now total force acting on bucket is zero. Therefore total work done on bucket is zero as W=F.d

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a. How much work do you do on the bucket in pulling it up ? B. How much work does gravity do on the bucket ?

Emmanuel120

3 Answers

Agrata Singh

Emmanuel120

Agrata Singh

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