The wind blows a rock of mass m off a cliff. the rock hits the ground below with speed v. then a rock of mass 2m is blown off the same cliff. it will hit the ground at what speed? assume that air resistance is negligible for both rocks.

2v

0.5v

4v

v

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).