The place used for determining whether an object is in motion is called

A reference point

Explanation: is a place or object used for comparison to determine if something is in motion.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

snell's law

refractve index = sin incidence / sin refraction