Question

An object of mass 2 kg is at rest at point A. It starts rolling from point A to point B before coming to a stop at point C. The path from A to B is smooth (no friction), but the path from B to C is rough (presence of friction). Choose the correct statement regarding the energy possessed by the object. (Take g = 10 m/s${}^2$)

• A. Mechanical energy at point A is > Mechanical energy at point B
• B. Mechanical energy at C = 0
• C. Kinetic energy at point B = 30 J
• D. Mechanical energy at point B = Mechanical energy at point C

Answer 1

The correct option is C Kinetic energy at point B = 30 J