A sphere of mass M and radius R2 has a concentric cavity of radius R1 as shown in figure. The force exerted by the sphere on a particle of mass m located at a distance r from the centre of sphere varies as (0r)

Subtopic:  Gravitational Field |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which one of the following graphs represents correctly the variation of the gravitational field (I) with the distance (r) from the centre of a spherical shell of mass M and radius a ?

Subtopic:  Gravitational Field |
 69%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Suppose, the acceleration due to gravity at the earth’s surface is 10 m/s2 and at the surface of Mars, it is 4.0 m/s2. A 60 kg passenger goes from the earth to Mars in a spaceship moving with a constant velocity. Neglect all other objects in the sky. Which part of the figure best represents the weight (net gravitational force) of the passenger as a function of time ?

(a) A                              (b) B

(c) C                              (d) D

 

Subtopic:  Gravitational Field |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

Which of the following graphs represents the motion of a planet moving about the sun ?

Subtopic:  Kepler's Laws |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The correct graph representing the variation of total energy (Et), kinetic energy (Ek) and potential energy (U) of a satellite with its distance from the centre of the earth is -

Subtopic:  Gravitational Potential Energy |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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

(1)     Gm/r2           

(2)    g

(3)      Zero             

(4)    None of these

Subtopic:  Gravitational Field |
 89%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : 2. The acceleration due to gravity on the planets will be in the ratio of:

1. 1 : 2                           
2. 2 : 3
3. 2 : 1                      
4. 4 : 1

Subtopic:  Acceleration due to Gravity |
 85%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

If the angular speed of the earth is doubled, the value of acceleration due to gravity (g) at the north pole

(1) Doubles                   

(2)  Becomes half

(3)  Remains same       

(4)   Becomes zero

Subtopic:  Acceleration due to Gravity |
 77%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

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 -

(1)   – 5000 J                     

(2)  – 1000 J

(3)   – 2400 J                      

(4)  5000 J

Subtopic:  Gravitational Potential Energy |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

At the surface of a certain planet, acceleration due to gravity is one-quarter of that on earth. If a brass ball is transported to this planet, then which one of the following statements is not correct?

1. The mass of the brass ball on this planet is a quarter of its mass as measured on earth
2. The weight of the brass ball on this planet is a quarter of the weight as measured on earth
3. The brass ball has the same mass on the other planet as on earth
4. The brass ball has the same volume on the other planet as on earth
Subtopic:  Acceleration due to Gravity |
 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch