MCQ
If a satellite orbits as close to the earth's surface as possible,
- Aits speed is maximum
- Btime period of its rotation is minimum
- Cthe total energy of the 'earth plus satellite' system is minimum
- ✓all of the above
✓
Answer
Correct option: D.
all of the above
d
Speed of satellite $\alpha \frac{1}{\sqrt{r}}$ Speed will be maximum Time period
Speed of satellite $\alpha \frac{1}{\sqrt{r}}$ Speed will be maximum Time period
$\alpha r^{\frac{3}{2}}$ it will be minimum
Total Energy $=-\frac{G M m}{2 r}$
Total energy is minimum.
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
A ball of mass $160\, g$ is thrown up at an angle of $60^o$ to the horizontal at a speed of $10\, m\,s^{-1}$ . The angular momentum of the ball at the highest point of the trajectcry with respect to the point from which the ball is thrown is nearly ........ $kg\, m^2/s$ $(g\, = 10\, m\,s^{-2})$
→A particle executing simple harmonic motion with an amplitude A and angular frequency $\omega$ The ratio of maximum acceleration to the maximum velocity of the particle is:
→The coefficient of static friction, ${\mu _s},$ between block $A$ of mass $2\, kg$ and the table as shown in the figure is $0.2$. ........ $kg$ would be the maximum mass value of block $B$ so that the two blocks do not move. The string and the pulley are assumed to be smooth and massless. $(g = 10\,m/{s^2})$
→A body is thrown horizontally from the top of a tower of height $5 \,m$. It touches the ground at a distance of $10 \,m$ from the foot of the tower. The initial velocity of the body is ......... $ms^{-1}$ ($g = 10\, ms^{-2}$)
→The velocity of a body can change:
A body of mass $2\, kg$ is situated at a height $5\, m$ above the ground. It's potential energy is reported as $70\, J$ . Potential energy of a $3\, kg$ body situated at height $1\,m$ above ground will be reported ................ $\mathrm{J}$
→Two trains are moving with equal speed in opposite directions along two parallel railway tracks. If the wind is blowing with speed $u$ along the track so that the relative velocities of the trains with respect to the wind are in the ratio of $1:2$, then the speed of each train must be
→A pipe $30 cm$ long is open at both ends. Which harmonic mode of the pipe is resonantly excited by a $1.1 kHz$ source ? (Take speed of sound in air =$ 330 ms^{-1}$)
→Water is flowing through a channel (lying in a vertical plane) as shown in the figure. Three sections $A, B$ and $C$ are shown. Sections $B$ and $C$ have equal area of cross section. If $P_A, P_B$ and $P_C$ are the pressures at $A, B$ and $C$ respectively then
→Three particles of equal mass $m$ are situated at the vertices of an equilateral triangle of side $l$. They are moving in a circle in influence of their mutual gravitational interaction. Then their time period of revolution is directly proportional to
→