हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान कक्षा ११

In our solar system, the inter-planetary region has chunks of matter (much smaller in size compared to planets) called asteroids. They ______.

Advertisements
Advertisements

प्रश्न

In our solar system, the inter-planetary region has chunks of matter (much smaller in size compared to planets) called asteroids. They ______.

विकल्प

  • will not move around the sun since they have very small masses compared to sun.

  • will move in an irregular way because of their small masses and will drift away into outer space.

  • will move around the sun in closed orbits but not obey Kepler’s laws.

  • will move in orbits like planets and obey Kepler’s laws.

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

In our solar system, the inter-planetary region has chunks of matter (much smaller in size compared to planets) called asteroids. They will move in orbits like planets and obey Kepler’s laws.

Explanation:

Because as we know asteroids move in orbits like planet which follows Kepler’s law as they act upon central gravitational forces.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Gravitation - Exercises [पृष्ठ ५८]

APPEARS IN

एनसीईआरटी एक्झांप्लर Physics [English] Class 11
अध्याय 8 Gravitation
Exercises | Q 8.6 | पृष्ठ ५८

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

A comet orbits the Sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum, (d) kinetic energy, (e) potential energy, (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun.


In the Following figure shows the elliptical path of a planet about the sun. The two shaded parts have equal area. If t1 and t2 be the time taken by the planet to go from a to b and from c to d respectively,


Answer the following question in detail.

State Kepler’s three laws of planetary motion.


State Kepler’s laws.


If the distance between the sun and the earth is made three times, then attraction between the two will ______


The mass and radius of earth is 'Me' and 'Re' respectively and that of moon is 'Mm' and 'Rm' respectively. The distance between the centre of the earth and that of moon is 'D'. The minimum speed required for a body (mass 'm') to project from a point midway between their centres to escape to infinity is ______.


To verify Kepler's third law graphically four students plotted graphs. Student A plotted a graph of T (period of revolution of planets) versus r (average distance of planets from the sun) and found the plot is straight line with slope 1.85. Student B plotted a graph of T2 v/s r3 and found the plot is straight line with slope 1.39 and negative Y-intercept. Student C plotted graph of log T v/s log r and found the plot is straight line with slope 1.5. Student D plotted graph of log T v/s log r and found the plot is straight line with slope 0.67 and with negative X-intercept. The correct graph is of student


Give one example each of central force and non-central force.


Draw areal velocity versus time graph for mars.


A star like the sun has several bodies moving around it at different distances. Consider that all of them are moving in circular orbits. Let r be the distance of the body from the centre of the star and let its linear velocity be v, angular velocity ω, kinetic energy K, gravitational potential energy U, total energy E and angular momentum l. As the radius r of the orbit increases, determine which of the above quantities increase and which ones decrease.


Earth’s orbit is an ellipse with eccentricity 0.0167. Thus, earth’s distance from the sun and speed as it moves around the sun varies from day to day. This means that the length of the solar day is not constant through the year. Assume that earth’s spin axis is normal to its orbital plane and find out the length of the shortest and the longest day. A day should be taken from noon to noon. Does this explain variation of length of the day during the year?


A satellite is in an elliptic orbit around the earth with aphelion of 6R and perihelion of 2 R where R= 6400 km is the radius of the earth. Find eccentricity of the orbit. Find the velocity of the satellite at apogee and perigee. What should be done if this satellite has to be transferred to a circular orbit of radius 6R ?

[G = 6.67 × 10–11 SI units and M = 6 × 1024 kg]


The maximum and minimum distances of a comet from the Sun are 1.6 × 1012 m and 8.0 × 1010 m respectively. If the speed of the comet at the nearest point is 6 × 104 ms-1, the speed at the farthest point is ______.


A planet revolving in an elliptical orbit has:

  1. a constant velocity of revolution.
  2. has the least velocity when it is nearest to the sun.
  3. its areal velocity is directly proportional to its velocity.
  4. areal velocity is inversely proportional to its velocity.
  5. to follow a trajectory such that the areal velocity is constant.

Choose the correct answer from the options given below:


lf the angular momentum of a planet of mass m, moving around the Sun in a circular orbit is L, about the center of the Sun, and its areal velocity is ______.


Two planets A and B of equal mass are having their period of revolutions TA and TB such that TA = 2TB. These planets are revolving in the circular orbits of radii rA and rB respectively. Which out of the following would be the correct relationship of their orbits?


Halley's Comet revolves around the sun for a time period of 76 years. The aphelion distance if perihelion is given by 8.9 × 1010 m, will be ______.

(Take, the mass of sun = 2 × 1030 kg and G = 6.67 × 10-11 Nm3/kg2)


How can an ellipse be drawn using pins and thread?


The time taken by a planet to orbit the Sun depends on ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×