fricn.

JEE Main 2015 Sample Questions › Mechanics questions › fricn.

A particle of mass m is placed on vertical fixed circular track and then it is given velocity v vertically downward at top most posn. on track . If block moves on track with constant speed then what is work done from top most pt. to lowest pt. by fricn. on block?

#Physics #Mechanics

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5 Answers

1

varun.tinkle ·2010-10-27 08:50:55

very simple .... assuming by ur question u meant that the object moves with a velocity v on the track

taking the earth and object as a system
then change in total enrgy =work done or as simply
mgr

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11

jeetopper jee ·2010-10-27 09:08:40

Varun is right.
u may also apply work energy theorm.
w_f+w_p.e=Î”ke
w+(-mgr)=0(as v is constant)
w=mgr

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6

AKHIL ·2010-10-27 10:04:13

ok thnx guys!!:)

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71

Vivek @ Born this Way ·2010-10-27 19:06:35

"Ye toh shuru hote hi khatam ho gaya"

Nice!!

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21

Shubhodip ·2010-10-27 23:21:55

agree with the covered part of viveks comment/// :P :P :P :P :P

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