MCQ
A particle moves with constant angular velocity in a circle. During the motion its
  • Energy is conserved
  • B
    Momentum is conserved
  • C
    Energy and momentum both are conserved
  • D
    None of the above is conserved

Answer

Correct option: A.
Energy is conserved
a
(a)In uniform circular motion (constant angular velocity) kinetic energy remains constant but due to change in velocity of particle its momentum varies.

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

A ray of light travels from a medium of refractive index $\mu$ to air. Its angle of incidence in the medium is i, measured from the normal to the boundary, and its angle of deviation is $\delta$. $\delta$ is plotted against $i$ which of the following best represents the resulting curve
The temperature drop through each layer of a two layer furnace wall is shown in figure. Assume that the external temperature $T_1$ and $T_3$ are maintained constant and $T_1 > T_3$. If the thickness of the layers $x_1$ and $x_2$ are the same, which of the following statements are correct.
An e.m.f.$E = 4\cos (1000t)$ volt is applied to an $LR$-circuit of inductance $3\, mH$ and resistance $4 \,ohms$. The amplitude of current in the circuit is.....$A$
If in the circuit, power dissipation is $150\, W$, then $R$ is ............... $\Omega$
$NPN$ transistor are preferred to $PNP$ transistor because they have
A wire of length $L$ and $3$ identical cells of negligible internal resistances are connected in series. Due to current, the temperature of the wire is raised by $\Delta T$ in a time $t$. A number $N$ of similar cells is now connected in series with a wire of the same material and cross-section but of length $2\, L$. The temperature of the wire is raised by the same amount $\Delta T$ in the same time $t$. the value of $N$ is
In photoelectric emission process from a metal of work function $1.8\, eV,$ the kinetic energy of most energetic electrons is $0.5\, eV.$ The corresponding stopping potential is  ......... $V$ 
The position vector of a particle is determined by the expression $\vec r = 3{t^2}\hat i + 4{t^2}\hat j + 7\hat k$ The distance traversed in first $10 \,sec$ is........ $m$
An electric motor operating on a $60\,V \,dc$ supply draws a current of $10\,A$ . If the efficiency of the motor is $50\%$ , the resistance of its winding is....$\Omega $
Two resistances are given as $R _1=(10 \pm 0.5)\,\Omega$ and $R_2=(15 \pm 0.5)\, \Omega$. The percentage error in the measurement of equivalent resistance when they are connected in parallel is