MCQ
According to Kepler, planets move in
- ACircular orbits around the sun
- BElliptical orbits around the sun with sun at exact centre
- CStraight lines with constant velocity
- ✓Elliptical orbits around the sun with sun at one of its foci
✓
Answer
Correct option: D.
Elliptical orbits around the sun with sun at one of its foci
d
(d)
(d)
Kepler's first law,
Law of Orbits : All planets move in elliptical orbits, with the surn at one of the foci of the ellipse.
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 hot body will radiate heat most rapidly if its surface is
A particle of mass $m$ is projected at $45^o$ at $V_0$ speed from point $P$ at $t = 0$. The angular momnetum of particle about $P$ at $t = \frac{V_0}{g}$ is:-
→One end of a light spring constant k is fixed to a wall and the other end is tied to a block placed on a smooth horizontal surface. In a displacement, the work done by the spring $\frac{1}{2\text{kx}^2}.$
The possible cases are:
→The possible cases are:
The force of gravitation is
The maximum elongation of a steel wire of $1 \mathrm{~m}$ length if the elastic limit of steel and its Young's modulus, respectively, are $8 \times 10^8 \mathrm{~N} \mathrm{~m}^{-2}$ and $2 \times 10^{11} \mathrm{~N} \mathrm{~m}^{-2}$, is:
→A stone thrown down with a speed $u$ takes a time $t_1$ to reach the ground, while another stone thrown upwards from the same point with the same speed takes time $t_2$. The maximum height the second stone reaches from the ground is
→A gas expands under constant pressure $P$ from volume ${V_1}$ to ${V_2}$. The work done by the gas is
→A Carnot engine take $5000 \,k\,cal$ of heat from a reservoir at $727\,^{\circ}C$ and gives heat to a $\operatorname{sink}$ at $127\,^{\circ}C$. The work done by the engine is $.......... \times 10^{6}\,J$
→A small ball is projected up a smooth inclined plane with an initial speed of $10\ m/s$ along the direction at $30^o $ to the bottom edge of the slope. It returns to the edge after $2\, s$. The ball is in contact with the inclined plane throughout the process. ....... $^o$ is the inclination angle of the plane.
→A particle is projected from the mid-point of the line joining two fixed particles each of mass $m.$ If the distance of separation between the fixed particles is $l,$ the minimum velocity of projection of the particle so as to escape is equal to
→