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?
  1. 50 J
  2. 100 J
  3. 150 J
  4. 200 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?
  • Step 1: Identify the mass of the object. In this case, the mass is 5 kg.
  • Step 2: Identify the height to which the object is lifted. Here, the height is 10 m.
  • Step 3: Know the value of gravitational acceleration (g). It is approximately 9.8 m/s².
  • Step 4: Use the formula for gravitational potential energy: Potential Energy = mass × g × height.
  • Step 5: Substitute the values into the formula: Potential Energy = 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 = mass × g × height.
  • Units of Measurement – Understanding the units involved in the calculation, such as kilograms for mass, meters for height, and joules for energy.
  • Acceleration due to Gravity – Recognizing that the standard value for g (acceleration due to gravity) is approximately 9.8 m/s² near the Earth's surface.
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