Problem #5: A merry-go-round has a radius of 3.0 m and a moment of inertia 400kg-m2. A boy of mass 40 kg runs tangent to the rim at a speed of 5.0 m/s and jumps on. If the merry-go-round is initially rotating at an angular velocity of 8 rad/s; a. What is the angular momentum of the merry-go-round before the boy jumps on? b. What is the angular velocity after the boy jumps on? c. What is the final angular momentum of the merry-go-round after the boy jumps on?

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Units and Dimensions

These are generally defined as the terms which precede or describes the dimensions further. These are also further divided into two parts namely fundamental units and the derived units.