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If a 5 kg object is moving with a speed of 10 m/s, what is its total mechanical

Practice Questions

Q1
If a 5 kg object is moving with a speed of 10 m/s, what is its total mechanical energy assuming no potential energy?
  1. 250 J
  2. 500 J
  3. 100 J
  4. 50 J

Questions & Step-by-Step Solutions

If a 5 kg object is moving with a speed of 10 m/s, what is its total mechanical energy assuming no potential energy?
  • Step 1: Identify the mass of the object. In this case, the mass (m) is 5 kg.
  • Step 2: Identify the speed of the object. Here, the speed (v) is 10 m/s.
  • Step 3: Use the formula for kinetic energy, which is KE = 0.5 * m * v².
  • Step 4: Substitute the values into the formula: KE = 0.5 * 5 kg * (10 m/s)².
  • Step 5: Calculate (10 m/s)², which equals 100 m²/s².
  • Step 6: Multiply 5 kg by 100 m²/s² to get 500 kg*m²/s².
  • Step 7: Multiply 500 kg*m²/s² by 0.5 to get 250 J.
  • Step 8: Conclude that the total mechanical energy is 250 J.
  • Kinetic Energy – The energy possessed by an object due to its motion, calculated using the formula KE = 0.5 * m * v².
  • Mechanical Energy – The sum of kinetic and potential energy in a system; in this case, only kinetic energy is considered.
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