MCQ
A satellite moves around the earth in a circular orbit of radius $r$ with speed $v$. If the mass of the satellite is $M$, its total energy is
- ✓$ - \frac{1}{2}M{v^2}$
- B$\frac{1}{2}M{v^2}$
- C$\frac{3}{4}M{v^2}$
- D$M{v^2}$
✓
Answer
Correct option: A.
$ - \frac{1}{2}M{v^2}$
a
(a) Total energy = $-$ (kinetic energy) = $ - \frac{1}{2}M{v^2}$
(a) Total energy = $-$ (kinetic energy) = $ - \frac{1}{2}M{v^2}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Two satellites $A$ and $B$ revolve round the same planet in coplanar circular orbits lying in the same plane. Their periods of revolutions are $1\, h$ and $8\, h,$ respectively. The radius of the orbit of $A$ is $10^{4}\; km$. The speed of $B$ is relative to $A$. When they are closed in $k m / h$ is
→A body is thrown with a velocity of $9.8 \,m/s$ making an angle of $30^o$ with the horizontal. It will hit the ground after a time ....... $\sec$
→A metal ball of density $7800\ kg/m^3$ is suspected to have a large number of cavities . It weighs $9.8$ $kg$ when weighed directly on a balance and $1.5$ $kg$ less when immersed in water . The fraction by volume of the cavities in the metal ball is approximately ....... $\%$
→A normal eye is not able to see objects closer than 25cm because:
A block of $\sqrt{3}\,kg$ is attached to a string whose other end is attached to the wall. An unknown force $F$ is applied so that the string makes an angle of $30^{\circ}$ with the wall. The tension $T$ is $...........\,N$ :(Given $g =10\,ms ^{-2}$ )
→|
Column $-I$ Angle of projection |
Column $-II$ |
| $A.$ $\theta \, = \,{45^o}$ | $1.$ $\frac{{{K_h}}}{{{K_i}}} = \frac{1}{4}$ |
| $B.$ $\theta \, = \,{60^o}$ | $2.$ $\frac{{g{T^2}}}{R} = 8$ |
| $C.$ $\theta \, = \,{30^o}$ | $3.$ $\frac{R}{H} = 4\sqrt 3 $ |
| $D.$ $\theta \, = \,{\tan ^{ - 1}}\,4$ | $4.$ $\frac{R}{H} = 4$ |
$K_i :$ initial kinetic energy
$K_h :$ kinetic energy at the highest point
In an experiment to find the liquid expansion coefficient $(\gamma)$ a column. of experimental liquid at $T\,^oC$ is balanced against another column of experimental liquid at $0\, ^o C$ by taking them in $U-$ tube. The expansion coefficient $(\gamma)$ is ?
→The phenomenon of Browninan movement may be taken as evidence of:
If $P, Q, R$ are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?
→A wire can be broken by applying a load of $20\, kg$ weight. The force required to break the wire of twice the diameter is .......... $kg\, wt$
→