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Q: Shot from a rifle. What will be the kinetic energy of the rifle if the rifle comes backwards without stopping?
  • A. More than the kinetic energy of the bullet
  • B. Less than the kinetic energy of the bullet
  • C. Equal to the kinetic energy of the bullet
  • D. Zero
Correct Answer: Option B - According to Newton third law, when we apply force on a body, it exerts the same force back, it is also called action-reaction force. This is why if the gun pushes the gunner backwards, then the kinetic energy of the gun will be less than the kinetic energy of the bullet
B. According to Newton third law, when we apply force on a body, it exerts the same force back, it is also called action-reaction force. This is why if the gun pushes the gunner backwards, then the kinetic energy of the gun will be less than the kinetic energy of the bullet

Explanations:

According to Newton third law, when we apply force on a body, it exerts the same force back, it is also called action-reaction force. This is why if the gun pushes the gunner backwards, then the kinetic energy of the gun will be less than the kinetic energy of the bullet