Physics- Velocity, Displacement, etc.

A child boards a bus for summer camp. His mom is waiting next to the bus. The bus begins moving 3 m/s east with respect to the ground. The child is walking 0.5 m/s west towards the back of the bus with respect to the bus. The mother begins running 1 m/s east with respect to the ground, chasing after the bus and thoroughly humiliating her child. What is the child’s velocity
a). relative to the ground?
b). relative to his mother?

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  1. relative to ground: 3E+.5W=2.5E
    relative to momma: 3E+.5W-1E=1.5E

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