A 62-kg boy on a 1.5-kg skateboard is moving at 1.2 m/s. The boy steps off the skateboard (Hint: this part is the collision- one thing separating into 2 things is an explosion collision) and now has a velocity of 1.1 m/s. How fast does the skateboard move after he steps off of it?

Aball horizontally thrown from a cliff at 8m/s

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space. a. zerob. πc. π/2d. not determinable by the information provided