Which of the following statements about moving particle is correct?
A
if the resultant force acting on the particle is zero, then it is in dynamic equillibrium
B
If the resultant force acting on the acting on the particle is greater than zero, then it is moving with a uniform velocity
C
the rate of change of its momentum with time tales place in a direction opposite to that of its motion
D
the particle falling freely covers equal distances in equal time interval
Verified Correct Answer: A.
Physical Principles & Numerical Solution
A particle is in dynamic equilibrium if the resultant force acting on it is zero. This means that the sum of all forces acting on the particle is zero, resulting in no acceleration or change in velocity. Therefore, the particle can either be at rest or moving with a constant velocity
Source: Myschool Past Questions Archive (Record #35261)