Answer: -30kgm/s
Explanation:
Mass M = 5kg
initial velocity V1 = 8m/s
Final velocity V2= 2m/s
Change in momentum = ?
Recall that momentum is the product of mass of an object and the velocity by which it moves.
i.e Momentum = Mass x Change in velocity
Momentum = M x (V2 - V1)
= 5kg x (2m/s - 8m/s)
= 5kg x (-6m/s)
= -30kgm/s (The negative momentum mean the mass is travelling in a negative direction)
Thus, the change in momentum is -30kgm/s
