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  1. Class 9
  2. Chapter 11 Class 9 - Work and Energy

Transcript

Example 11.3 An object of mass 15 kg is moving with a uniform velocity of 4 m s–1. What is the kinetic energy possessed by the object? Mass of the object = m = 15 kg Velocity of the object = v = 4 m/s Kinetic energy = 1/2 mv2 = 1/2 × 15 × (4)2 = 1/2 × 15 × 16 = 15 × 8 = 120 J The kinetic energy is 120 J

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CA Maninder Singh is a Chartered Accountant for the past 9 years and a teacher from the past 16 years. He teaches Spoken English, Written English, Grammar and Vocabulary at Englishtan.