Brand new Course Package released! Get 99% off your first purchase with code “99”. Find out more!
Back
0

Shopping cart

Close

No products in the cart.

Raman

HomeAuthor: RamanPage 6

Escape velocity on a planet is ve . If radius of the planet remains same and mass becomes 4 times, the escape velocity becomes

(a)       4 ve                               ...

The escape velocity of an object from the earth depends upon the mass of the earth (M), its mean density (p), its radius (R) and the gravitational constant (G). Thus the formula for escape velocity is             

Answer:  a (7)

A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is

(a)      Positive (b)  Negative (c)   Zero (d)  May be positive or negative depending upon its initial velocity Answer: b (8)

If g is the acceleration due to gravity at the earth’s surface and r is the radius of the earth, the escape velocity for the body to escape out of earth’s gravitational field is

(a)      gr                          (b)   √2gr (c)      g/r ...

The escape velocity for a rocket from earth is 11.2 km/sec. Its value on a planet where acceleration due to gravity is double that on the earth and diameter of the planet is twice that of earth will be in km/sec

(a)      11.2                                (b)     5.6...

The escape velocity from the earth is about 11 km/second. The escape velocity from a planet having twice the radius and the same mean density as the earth, is

(a)      22 km/sec                       (b)  11 km/s (c)   5.5 km/sec                        (d)  15.5 km/sec Answer: a (8)

For the moon to cease to remain the earth’s satellite, its orbital velocity has to increase by a factor of

(a)      2               (b)     √ 2 (c)    1/√2         (d)  √3 Answer: ...

The escape velocity of a particle of mass m varies as

(a) m2                    (b)  m (c)  m0           ...

The escape velocity of a projectile from the earth is approximately

(a)      11.2 m/sec                      (b)  112 km/sec (c)   11.2 km/sec                      (d)  11200 km/sec Answer:  c (10)

The escape velocity of a sphere of mass m from earth having mass M and radius R is given by

Answer: a (14)

Gas escapes from the surface of a planet because it acquires an escape velocity. The escape velocity will depend on which of the following factors : I. Mass of the planet II. Mass of the particle escaping III. Temperature of the planet IV. Radius of the planet Select the correct answer from the codes given below :

(a)      I and II                                       (b)  II and IV (c)   I and IV                 ...

A particle falls towards earth from infinity. It’s velocity on reaching the earth would be

(a)  Infinity                               (b) √2 gR (c)   2√gR                         ...

A body of mass m kg. starts falling from a point  2R above the Earth’s surface. Its kinetic energy when it has fallen to a point ‘R’ above the Earth’s surface [R-Radius of Earth, M-Mass of Earth, G-Gravitational Constant]           

(a)   1/4 (GMm /R)                (b) 1/6 ( (GMm /R) (c)    2/3 (GMm...

A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is

(a)  R/3                                     (b)  R/2 (c)   R/4                                     (d)  R/5 Answer: a (6)

In some region, the gravitational field is zero. The gravitational potential in this region

(a)  Must be variable               (b)  Must be constant (c)   Cannot be zero                  (d)  Must be zero Answer: b (11)

Radius of orbit of satellite of earth is R. Its kinetic energy is proportional to

(a)    1/R                                  (b) ...

The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is

(a)  mgR/2                               (b)  2 mgR (c)   mgR                                    (d)  mgR/4 Answer:  c (5)

Energy required to move a body of mass m from an orbit of radius 2R to 3R is

(a)  GMm/ 12R2                  (b) GMm/ 3R2 (c)  GMm / 8R    ...

A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface to a height h=3R . The change in gravitational potential energy of the body is

(a)    2/3 mgR                (b) 3/4 mgR (c)    mgR/2       ...

Escape velocity of a body of 1 kg mass on a planet is 100 m/sec. Gravitational Potential energy of the body at the Planet is

(a)  – 5000 J                             (b)  – 1000 J (c)   – 2400 J                             (d)  5000 J Answer: A (6)

The gravitational potential energy of a body of mass ‘m’ at the earth’s surface  -mgRe  . Its gravitational potential energy at a height  Re from the earth’s surface will be (Here  is Re the radius of the earth)

(a)    -2 mgR e                         (b) 2 mgR e (c)   ...

What is the intensity of gravitational field of the centre of a spherical shell

(a)     Gm/R2                                   ...

There are two bodies of masses 100 kg and 10000 kg separated by a distance 1 m. At what distance from the smaller body, the intensity of gravitational field will be zero

(a)    1/9 m                          (b) 1/10 m (c) ...

A rocket is launched with velocity 10 km/s. If radius of earth is R, then maximum height attained by it will be

(a)      2R                                  (b)   ...

If mass of earth is M, radius is R and gravitational constant is G, then work done to take 1 kg mass from earth surface to infinity will be

(a)      √GM/2R                      (b)  GM/R (c)   2√GM/R       ...

The masses and radii of the earth and moon are  M1,R1 and M2,R2  respectively. Their centres are distance d apart. The minimum velocity with which a particle of mass m should be projected from a point midway between their centres so that it escapes to infinity is

answer-a (9)

The change in potential energy, when a body of mass m is raised to a height nR from the earth’s surface is (R = Radius of earth)

(a)   mgR n/n-1                                   (b) ...

The mass of the earth is  6.00 × 10^24 kg  and that of the moon is 7.40 × 10^22 kg  . The constant of gravitation G=6.67 × 10^-11 N-M^2/kg^2. The potential energy of the system is -7.79 × 10^28 joules  . The mean distance between the earth and moon is

(a)     3.80×108 metres                     (b) 3.37 ×106 metres (c)   7.60×104  metres   ...

A satellite revolves around the earth in an elliptical orbit. Its speed

(a)      Is the same at all points in the orbit (b)  Is greatest when it is closest to the earth...

A small satellite is revolving near earth’s surface. Its orbital velocity will be nearly

(a)      8 km/sec                            (b)  11.2 km/sec (c)   4 km/sec                            (d)  6 km/sec Answer: a (12)

A geostationary satellite

(a)      Revolves about the polar axis (b)  Has a time period less than that of the near earth satellite (c)  ...

Two satellites A and B go round a planet P in circular orbits having radii 4R and R If the speed of the satellite A is 3V, the speed of the satellite B will be.

  (a)      12 V                (b)    6 V (c)     4/3  V   ...

The relay satellite transmits the T.V. programme continuously from one part of the world to another because its

(a)      Period is greater than the period of rotation of the earth (b)  Period is less than the period of...

11. If a satellite is orbiting the earth very close to its surface, then the orbital velocity mainly depends on

(a)      The mass of the satellite only (b)  The radius of the earth only (c)   The orbital radius only (d) ...

The period of a satellite in a circular orbit around a planet is independent of

(a)      The mass of the planet (b)  The radius of the planet (c)   The mass of the satellite (d)  All...

The mean radius of the earth is R, its angular speed on its own axis is ω  and the acceleration due to gravity at earth’s surface is g. The cube of the radius of the orbit of a geostationary satellite will be  

(a)     R2g/ ω                                ...

25. Orbital velocity of earth’s satellite near the surface is 7 km/s. When the radius of the orbit is 4 times than that of earth’s radius, then orbital velocity in that orbit is

(a)      3.5 km/s                           (b)  7 km/s (c)   72...

The time period of a geostationary satellite is

(a)      24 hours                       (b)  12 hours (c)       ...

Orbital velocity of an artificial satellite does not depend upon

(a)      Mass of the earth (b)  Mass of the satellite (c)   Radius of the earth (d)  Acceleration due to gravity...

A satellite is moving around the earth with speed v in a circular orbit of radius r. If the orbit radius is decreased by 1%, its speed will

(a)      Increase by 1%                         (b)  Increase by 0.5% (c)   Decrease by 1%                 ...

Popular posts

Haryana Police Recruitment Group C & D Vacancies & Coaching | Haryana CET Based Preparation
NEET 2026 FAQ – Syllabus, Exam Date, Preparation Tips & Course (Flame Institute)
SSC GD 2026, Notification, Apply Online, Vacancy, Eligibility, Exam Date, Syllabus, Online Form, Age Limit, PET/PST, Selection Process

Sign up to receive latest updates

Get in touch

Call us directly?

9888949978

Address

Flame Institute SCF 18 Near Chawla Lights Phase 7 Mohali

Email

FlameInstitute@gmail.com
Need some help?
Popular subjects
Need some help?

Youtube

2,3M Subribe

Facebook

2,3M Subribe

Instagram

2,3M Subribe

Twitter

2,3M Subribe
  • © 2025 Flame Institute.All rights reserved.
English
USD
error: Content is protected !!
Courses
Search

Search

    ArticlesCart