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?

16 km/h

Ingrid is jogging at a speed of 9 km/h. She passes the relay stick to her team and tosses the stick at 16 km/h. In Ingrid's frame of reference, speed of relay stick is 16 km/h because, she is at rest in her own reference frame. so, relative to Ingrid, speed of relay stick is 16 km/h.

If we were asked to find the speed of relay stick relative to her teammate, then the speed of Ingrid would have been added to the speed of tossing the stick.

the ima (higher than 1m) will be greater than the ima with the height of 1m.