A 10 kg object is lifted to a height of 2 m. What is the work done against gravi

Practice Questions

Q1
A 10 kg object is lifted to a height of 2 m. What is the work done against gravity?
  1. 20 J
  2. 40 J
  3. 60 J
  4. 80 J

Questions & Step-by-Step Solutions

A 10 kg object is lifted to a height of 2 m. What is the work done against gravity?
Correct Answer: 196 J
  • Step 1: Identify the mass of the object. In this case, the mass is 10 kg.
  • Step 2: Identify the height to which the object is lifted. Here, the height is 2 m.
  • Step 3: Know the acceleration due to gravity (g). It is approximately 9.8 m/s².
  • Step 4: Use the formula for work done against gravity: Work done = mass × g × height.
  • Step 5: Substitute the values into the formula: Work done = 10 kg × 9.8 m/s² × 2 m.
  • Step 6: Calculate the result: 10 × 9.8 × 2 = 196 J.
  • Work Done Against Gravity – The work done against gravity is calculated using the formula: Work = mass × gravitational acceleration × height.
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