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Hot air balloon A is rising upward a rate of 5.0 m/s. A passenger aboard balloon A observes balloon B rising upward at a relative rate of 7.5 m/s. What is the velocity of balloon B relative to the ground? Assume that up is positive.

Respuesta :

heinseberg
Velocity B (relative to the A) = Velocity B (relative to the ground) - Velocity A (relative to the ground)

Velocity B (relative to the ground) = Velocity B (relative to the A) + Velocity A (relative to the ground)

Velocity B (relative to the ground) = 7.5 + 5 = 12 m/s

Since both go up in the same direction, we should use the minus sign for relative velocity.

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