Question

A body of mass m = 3.513kg is moving along the x-axis with a speed of 5.00ms^–1. The magnitude of its momentum is recorded as
(a) 17.57kgms^–1 

(b) 17.6kgms^–1

(c) 17.565kgms^–1 

(d) 17.56kgms^–1 .

Answer 1

(a) : Momentum is mv.

m = 3.513kg ; v = 5.00m/s
Therefore  mv = 17.57ms^–1
Because the values will be accurate up to second
decimel place only, 17.565 = 17.57kgms^–1 .