A 10 kg object is lifted to a height of 5 m. What is the potential energy gained

Practice Questions

Q1
A 10 kg object is lifted to a height of 5 m. What is the potential energy gained? (Take g = 9.8 m/s²) (2021)
  1. 490 J
  2. 980 J
  3. 390 J
  4. 590 J

Questions & Step-by-Step Solutions

A 10 kg object is lifted to a height of 5 m. What is the potential energy gained? (Take g = 9.8 m/s²) (2021)
Correct Answer: 490 J
  • Step 1: Identify the mass of the object. In this case, the mass (m) is 10 kg.
  • Step 2: Identify the height to which the object is lifted. Here, the height (h) is 5 m.
  • Step 3: Identify the acceleration due to gravity. We are given that g = 9.8 m/s².
  • Step 4: Use the formula for potential energy (PE), which is PE = mgh.
  • Step 5: Substitute the values into the formula: PE = 10 kg × 9.8 m/s² × 5 m.
  • Step 6: Calculate the result: 10 × 9.8 × 5 = 490 J.
  • Step 7: Conclude that the potential energy gained is 490 Joules.
  • Potential Energy – Potential energy is the energy stored in an object due to its position in a gravitational field, calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.
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