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A 5 kg toy truck moves to 2 m/s east , it colllides head-on with a2kg toy car moving 5 m/s moving west . What is the total momentum of the system?

A) kgm/s 30
B) kgm/s 0
C) kgm/s -20
D) non of it

Respuesta :

indrawboy

Momentum

eastward = +

westward = -

[tex]\tt P_A=5\times 2=10~kg.m/s\\\\P_B=2\times 5=-10~kg.m/s[/tex]

total momentum:

[tex]\tt P_A+P_B=10-10=0~kg.m/s[/tex]

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