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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?

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