(a) Write an expression for the change in momentum of a body of mass m

1.	(a) Write an expression for the change in momentum of a body of mass m moving with velocity v if (i) v ≪ c and (ii) v ⟶ c.(b) State the condition when the change in the momentum of a body depends only on the change in its velocity.
Answer» (i) When v <c, Δp = mΔv. (ii) When v → c, the change in momentum is Δp = Δ(mv) If velocity v of the moving body is much smaller than the velocity of light c (v < c)

(a) Write an expression for the change in momentum of a body of mass m moving with velocity v if (i) v ≪ c and (ii) v ⟶ c.(b) State the condition when the change in the momentum of a body depends only on the change in its velocity.

Answer»

(i) When v <c, Δp = mΔv.

(ii) When v → c, the change in momentum is Δp = Δ(mv)

If velocity v of the moving body is much smaller than the velocity of light c (v < c)