A constant force acting on a body is suddenly decreased to zero. Then the velocity of
the body
A. first increases and then
Cincreases
decreases
D. becomes zero
B. decreases
E remains the same
Answers
Answer:
The answer is B. Decreases
The velocity of the body will first increase (if the applied force is in the direction of the velocity) and then when the force is removed it will continues its latest state of uniform motion.
Explanation:
When a force acts on a body with no other forces acting on it then the force causes acceleration in the body due to which it speed keeps on increasing. This is in accordance with the Newton's second law which states that the rate of change in momentum is directly proportional to the applied force.
And when the force is decreased to zero then it continues to be in uniform motion in accordance with the Newton's first law of motion keeping-up with its state of inertia.
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TOPIC: Newton's Law of Motion
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