A solid cylinder with a mass of 2.72 kg and a radius of 0.083 m starts from rest at a height of 4.20 m and rolls down a 88.7 ◦ slope. What is the translational speed of the cylinder when it leaves the incline? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.

Explanation:

According to the law of conservation of energy ,    

             Potential energy = kinetic energy

                  I =

     mgh =

                  v = 7.4 m/s

thus, we can conclude that the translational speed of the cylinder when it leaves the incline is 7.4 m/s.

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the answer is b ) square root of 5