Q1. A stone of mass 0.31 kg is tied to a string of length 0.85 m and is swung in the horizontal circle with speed v. The string has a breaking-point force of 90 N. What is the largest value v can have without string breaking?
Q2. What will a spring scale read for the weight of a 66 woman in an elevator that moves upward with constant speed of 5.1?