Question

ingrid is participating in a relay race. while jogging at 9 km/h, she tosses a relay stick at 16 km/h to her teammate, who is standing still. how fast is the relay stick moving relative to ingrid? 8 km/h 9 km/h 16 km/h 25 km/h

Explanation:

Step1: Understand relative - velocity concept

Relative velocity of an object with respect to a moving observer is considered. Ingrid is moving and she throws the stick.

Step2: Analyze the situation

When Ingrid throws the stick at 16 km/h, from her perspective, the speed of the stick is just the speed at which she throws it because she is moving with her own velocity and is the reference - frame. The velocity of Ingrid herself does not affect the relative velocity of the stick with respect to her.

Answer:

C. 16 km/h