Apple and Knife Explanation || Full Explanation 

Reason : Newton's first law of motion. (or Due to inertia of rest)
Question : What is Newton's first law of motion?
Answer : Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This tendency to resist changes in a state of motion is inertia.
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#Apple_and_knife_experiment
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