An object is lifted to a height of 10 m. If the mass of the object is 5 kg, what

Practice Questions

Q1
An object is lifted to a height of 10 m. If the mass of the object is 5 kg, what is the gravitational potential energy gained? (g = 9.8 m/s²)
  1. 49 J
  2. 98 J
  3. 245 J
  4. 490 J

Questions & Step-by-Step Solutions

An object is lifted to a height of 10 m. If the mass of the object is 5 kg, what is the gravitational potential energy gained? (g = 9.8 m/s²)
  • Step 1: Identify the mass of the object. In this case, the mass (m) is 5 kg.
  • Step 2: Identify the height to which the object is lifted. Here, the height (h) is 10 m.
  • Step 3: Identify the acceleration due to gravity. The value of g is given as 9.8 m/s².
  • Step 4: Use the formula for gravitational potential energy (PE), which is PE = mgh.
  • Step 5: Substitute the values into the formula: PE = 5 kg * 9.8 m/s² * 10 m.
  • Step 6: Calculate the result: 5 * 9.8 * 10 = 490 J.
  • Step 7: Conclude that the gravitational potential energy gained is 490 Joules.
  • Gravitational Potential Energy – The energy an object possesses due to its position in a gravitational field, calculated using the formula PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.
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