MCQ
If net force on a system is zero then
  • A
    Its momentum is conserved
  • All of these
  • C
    Its kinetic energy may increase
  • D
    The acceleration of its a constituent particle may be non-zero

Answer

Correct option: B.
All of these
b
(b)

Due to internal forces kinetic energy or acceleration of its constituent particle may be non-zero.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If the length of a pendulum is made $9$ times and mass of the bob is made $4$ times then the value of time period becomes
A wheel is of diameter $1\ m.$ If it makes $30$ revolution per second, then the linear speed of a point on its circumference will be 
A solid body of constant heat capacity $1\ J/^o C$ is being heated by keeping it in contact with reservoirs in two ways :

$(i)$ Sequentially keeping in contact with $2$ reservoirs such that each reservoir supplies same amount of heat.

$(ii)$ Sequentially keeping in contact with $8$ reservoirs such that each reservoir supplies same amount of heat.

In both the cases body is brought from initial temperature $100^o C$ to final temperature $200^o C$. Entropy change of the body in the two cases respectively is :

The phenomenon of beats can take place:
​​​​​​
The mass density of a spherical body is given by $\rho \left( r \right) = \frac{k}{r}$ for $r \leq R\,\,$ and $\rho \left( r \right) = 0\,$ for $r > R$ , where $r$ is the distance from the centre. The correct graph that describes qualitatively the acceleration, $a$, of a test particle as a function of $r$ is
The efficiency of an engine will be maximum when it works:
If $T$ be the surface tension, the amount of work done in blowing a soap bubble from a diameter $d$ to diameter $D$ is
Newton's third law of motion leads to the law of conservation of
A body of mass $5\,kg$ is suspended by a spring balance on an inclined plane as shown in figure. The spring balance measure ............ $N$
Two periodic waves of amplitudes $A_1$ and $A_2$ pass through a region. If $A_1>A_2$, the difference in the maximum and minimum resultant amplitude possible is: