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Physics Part-I
Class 11
NCERT
1
Chapter 1: Physical World
16 questions
2
Chapter 2: Units and Measurements
51 questions
3
Chapter 3: Motion in Straight Line
50 questions
4
Chapter 4: Motion in a Plane
43 questions
5
Chapter 5: Laws of motion
52 questions
6
Chapter 6: Work, Energy and Power
41 questions
7
Chapter 7: System of Particles and Rotational Motion
45 questions
8
Chapter 8: Gravitation
33 questions
Q1
Does the escape speed of a body from the earth depend on (a) The mass of the body, (b) The location from where it is projected, (c) The direction of projection, (d) The height of the location from where the body is launched?
Q2
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.
Q3
Which of the following symptoms is not likely to afflict an astronaut in space
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Solving time: 2 mins
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.
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A comet while going on elliptical orbit around the Sun has constant angular momentum due to no external torque and total energy due to Law of conservation of energy at all locations but other quantities vary with locations.
(a) Since angular momentum is constant, is constant. As r changes in elliptical orbit, speed is not constant.
(b)
Since angular momentum is constant, is constant. As r changes in elliptical orbit, angular speed is not constant.
(c)
Angular momentum is constant because there is no external torque.
(d)
Since speed is not constant, Kinetic Energy is not constant.
(e)
Total energy is constant by law of conservation of energy.
Since is not constant, is not constant.
(f) Total energy is constant by law of conservation of energy.
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Does the escape speed of a body from the earth depend on (a) The mass of the body, (b) The location from where it is projected, (c) The direction of projection, (d) The height of the location from where the body is launched?
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| Question Text | 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. |
| Updated On | Apr 19, 2022 |
| Topic | Gravitation |
| Subject | Physics |
| Class | Class 11 |
| Answer Type | Text solution:1 Video solution: 2 |
| Upvotes | 281 |
| Avg. Video Duration | 6 min |
