Q1. An 920 N sled is pulled a distance of 197 m. The task requires 1.20 104 J of work and is completed through pulling on a rope with a force of 125 N. At what angle is the rope held?
Q2. What is the radius of curvature of a concave mirror that magnifies through a factor of +3.5 an object placed 27 cm from the mirror?
Q3. What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 76.0 rev/min in 3.50 s?