Q.No.3: - Attempt any
two 2 x 5 = 10
(i) Calculate the (a) time of flight (b) height of projectile (c)
range of projectile
(ii) Derive the relation of absolute of P.E at the surface of
Earth.
(iii) State and explain law of conservation of energy.
(iv) Find the final velocities of balls after an elastic
collision.
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