What Happens When the Net Force on a System of Particles is Zero?

[pink_ele]

Q 5 Match the column
If net force on a system of particles is zero then
Table 1 Table 2

a) acc. of COM p) constant

b)momentum of COM q)zero

c)velocity of COM r) may be zero

d)velocity of individual particles s) may be constant

Ans is 5>a - pq, b - pr, c-pr, d-rs

 

[Shooting Star]

Ans is 5>a - pq, b - pr, c-pr, d-rs

a - pq is not correct.

Can you match more than two on the right with one on the left?

 

[Moetasim]

Explanation: When the net force on a system of particles is zero, it means that the total force acting on the system is balanced and there is no overall acceleration. This can be seen by applying Newton's second law, which states that the net force on an object is equal to its mass multiplied by its acceleration (F=ma). If the net force is zero, then the acceleration must also be zero.

Table 1 shows the possible outcomes for different properties of the system when the net force is zero. The properties listed are the acceleration (a), momentum (p), and velocity (v) of the center of mass (COM) and the velocity of individual particles in the system.

From Table 2, we can see that the correct matches are:

a) Acceleration of COM (a) - may be zero (p)
b) Momentum of COM (p) - constant (q)
c) Velocity of COM (v) - constant (r)
d) Velocity of individual particles (v) - may be zero (s)

This means that when the net force is zero, the acceleration of the COM may or may not be zero, depending on the individual masses and velocities of the particles in the system. The momentum of the COM will always be constant, as there is no net force acting on the system to change it. The velocity of the COM will also be constant, as there is no net force to cause it to change. However, the velocity of individual particles in the system may or may not be zero, depending on their masses and velocities.