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If a 10 kg object is raised to a height of 5 m, what is the work done against gr

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Question: If a 10 kg object is raised to a height of 5 m, what is the work done against gravity? (g = 9.8 m/s²)

Options:

  1. 490 J
  2. 980 J
  3. 150 J
  4. 250 J

Correct Answer: 980 J

Solution: 

Work = m * g * h = 10 kg * 9.8 m/s² * 5 m = 490 J.

If a 10 kg object is raised to a height of 5 m, what is the work done against gr

Practice Questions

Q1
If a 10 kg object is raised to a height of 5 m, what is the work done against gravity? (g = 9.8 m/s²)
  1. 490 J
  2. 980 J
  3. 150 J
  4. 250 J

Questions & Step-by-Step Solutions

If a 10 kg object is raised to a height of 5 m, what is the work done against gravity? (g = 9.8 m/s²)
  • 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 raised. Here, the height (h) is 5 m.
  • Step 3: Identify the acceleration due to gravity. The value of g is 9.8 m/s².
  • Step 4: Use the formula for work done against gravity: Work = m * g * h.
  • Step 5: Substitute the values into the formula: Work = 10 kg * 9.8 m/s² * 5 m.
  • Step 6: Calculate the result: 10 * 9.8 * 5 = 490 J.
  • Work Against Gravity – The work done against gravity is calculated using the formula Work = mass * gravitational acceleration * height.
  • Units of Measurement – Understanding the units involved (kg for mass, m/s² for acceleration, m for height) is crucial for correct calculations.
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