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Grade 11Mechanics

hi my name is jenil i am in std 11 i have one dout numerical no one is solving it. a man going with velocity 5 m/s.no other force acting so the work done is?

jenil

6 Years agoGrade 11

4 Answers

Kaushal Negi

6 Years ago

Okay Jenil read carefully

Since the acceleration of the man is zero because he is moving with a constant velocity, i.e. 5m/s.

Work done = F.s

F=m*a

As acceleration is zero so the force will also be zero.

Hence work done by the man will be zero

Vikas TU

6 Years ago

Dear student

You have mentioned in the question that the velocity is constant , if it wil vary with some another variabe , Then it would be in terms of some variables,

acceleration = dv /dt

So a = 0

So work done wil be zero.

Good Luck

aswanth nayak

6 Years ago

Dear Student,

Youhave mentioned in the question that the velocity is constant, if it will vary with some other variable,then it would be in terms of some variables, Since the acceleration of man is zero because he is moving with a constant velocity

Therefore , W = F.S

and we know that F=m*a

As Acceleration is zero, Force will also be zero

Hence here work done by the man will be zero.

Hope this helps you

Regards

Ayush_Deep

6 Years ago

Dear friend , since there is no force acting on body ,there will be no work done

Work done = F*S

F=0 so W=0

Thanks

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