A 2 kg object is lifted to a height of 5 m. What is the potential energy gained

Practice Questions

Q1
A 2 kg object is lifted to a height of 5 m. What is the potential energy gained by the object? (2022)
  1. 10 J
  2. 20 J
  3. 30 J
  4. 40 J

Questions & Step-by-Step Solutions

A 2 kg object is lifted to a height of 5 m. What is the potential energy gained by the object? (2022)
  • Step 1: Identify the mass of the object. In this case, the mass is 2 kg.
  • Step 2: Identify the height to which the object is lifted. Here, the height is 5 m.
  • Step 3: Use the acceleration due to gravity (g). For this problem, we will use 10 m/s² as an approximation.
  • Step 4: Use the formula for potential energy: Potential Energy = mass × g × height.
  • Step 5: Substitute the values into the formula: Potential Energy = 2 kg × 10 m/s² × 5 m.
  • Step 6: Calculate the result: 2 × 10 = 20, then 20 × 5 = 100.
  • Step 7: Conclude that the potential energy gained by the object is 100 Joules.
  • Potential Energy – The energy an object possesses due to its position in a gravitational field, calculated using the formula PE = mass × g × height.
  • Gravitational Acceleration – The acceleration due to gravity, commonly approximated as 10 m/s² for simplicity in calculations.
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