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A particle moves in a straight line under the influence of a constant force. If

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Question: A particle moves in a straight line under the influence of a constant force. If the initial kinetic energy is 100 J and the work done by the force is 50 J, what is the final kinetic energy?

Options:

  1. 50 J
  2. 100 J
  3. 150 J
  4. 200 J

Correct Answer: 150 J

Solution: 

Final kinetic energy = Initial kinetic energy + Work done = 100 J + 50 J = 150 J.

A particle moves in a straight line under the influence of a constant force. If

Practice Questions

Q1
A particle moves in a straight line under the influence of a constant force. If the initial kinetic energy is 100 J and the work done by the force is 50 J, what is the final kinetic energy?
  1. 50 J
  2. 100 J
  3. 150 J
  4. 200 J

Questions & Step-by-Step Solutions

A particle moves in a straight line under the influence of a constant force. If the initial kinetic energy is 100 J and the work done by the force is 50 J, what is the final kinetic energy?
  • Step 1: Identify the initial kinetic energy of the particle, which is given as 100 J.
  • Step 2: Identify the work done by the force on the particle, which is given as 50 J.
  • Step 3: Use the formula for final kinetic energy, which is: Final kinetic energy = Initial kinetic energy + Work done.
  • Step 4: Substitute the values into the formula: Final kinetic energy = 100 J + 50 J.
  • Step 5: Calculate the final kinetic energy: 100 J + 50 J = 150 J.
  • Work-Energy Theorem – The theorem states that the work done on an object is equal to the change in its kinetic energy.
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