- Work-Energy Theorem: Net Work Done = Change in Kinetic Energy. - Initial Kinetic Energy = (1/2)mv_i^2. - Final Kinetic Energy = (1/2)mv_f^2. - Work done by friction = - f d.
A block of mass 2 kg, moving with the initial speed of 3 m/s comes to rest on a rough horizontal surface after travelling a distance of 3 m. The magnitude of the frictional force is :
Asked in UPSC NDA 1 2024 · Topic: Mechanics (Newton's Laws of Motion and their applications)
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