In the picture below, sphere X swings down and collides with sphere Y. Identify the action and reaction forces.  Action force: 
Reaction force: 

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value