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As defined in physics, work is:
a) A scalar quantity
b) Always a positive quantity
c) A vector quantity
d) Always zero
Ans:
As defined in physics, work is a scalar quantity.
A particle is projected from ground with velocity 40sqrt2m/s.find- a)velocity and b)displacement of particle after 2sec .Take g=10m/s^2 Ans) velocity v=u+at a=-g v=40√2-10*2
why effective mass are tensor quantities
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