A. by Newton's first law
A.
B. by Newton's second law
B.
C. by Newton's third law
C.
D. by the principle of conservation of momentum
D.
Correct Answer: A
সঠিক উত্তর: A
Explanation
ব্যাখ্যা
Newton’s first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by force.