Hi friends ,
A girl is carrying a school bag of 3 kg has the same diameter as an aluminum sphere of mass 3.5 kg.Both the spheres are dropped simultaneously from a tower .When they are 10m above the ground ,they have the same::
a.6000 J
b.0.6 J
c.0 J
d.6 J
A girl is carrying a school bag of 3 kg has the same diameter as an aluminum sphere of mass 3.5 kg.Both the spheres are dropped simultaneously from a tower .When they are 10m above the ground ,they have the same::
a.6000 J
b.0.6 J
c.0 J
d.6 J
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actually,workdone is the product of force and displacement along force .
here we see a girl carrying a school bag then, dropped simultaneously. it means displacement of body = zero [ because body move equal distance in opposite direction.]
hence, net workdone during motion = force . displacement
= force . zero
= zero
now, here we see that , no external force act on bag.
so, total energy = - workdone
= 0J
hence, total energy of both have same e.g zero.
[ actually, potential energy manage the kinetic energy . that's why total energy = PE + KE = 0]
Answer:
Answer is Option C - O joules..
Hope it helps!!!