
The value of acceleration due to gravity does not depend upon the mass of the body.
Reason: Acceleration due to gravity is a constant quantity.
A. Both Assertion and Reason are correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect and Reason is correct
Answer
148.2k+ views
Hint: We should know that freefall is a special case of motion with constant acceleration, because acceleration due to gravity is always constant and downward. This is true even when an object is thrown upward or has zero velocity. Acceleration from gravity is always constant and downward, but the direction and magnitude of velocity change. According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration.
Complete step-by step answer:
We should keep in mind that since g is calculated using only constants, g is a constant. where Re is the radius of the earth. As earth is not a perfect sphere, the value of gravity g is not a constant at all the locations on the surface of the earth. Therefore, for practical purposes we take acceleration due to gravity as a constant.
We should be knowing that the acceleration due to gravity is always negative. Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of , regardless of the direction. The acceleration is negative when going up because the speed is decreasing.
It is seen that the first the assertion says that acceleration due to gravity does not depend on mass of the body it is true as because if we drop an egg and a watermelon from same height at same time both will hit the ground at the same time so Assertion is true but the reason acceleration, due to gravity is constant quantity is false because gravitational force depends on a separation which is not constant.
Hence, the correct answer is Option C.
Note: It should be known to us that acceleration is the rate of change of velocity with time. As the velocity is a constant value over all the values of time, the rate of change of velocity is thus zero. So, acceleration is zero. So, zero acceleration and non-zero velocity are possible for particles moving with constant velocity. In the case of the earth, the force of gravity is greatest on its surface and gradually decreases as you move away from its centre as a square of the distance between the object and the centre of the Earth. Of course, the earth is not a uniform sphere so the gravitational field around it is not uniform.
On the other hand, the sensation of weightlessness, or zero gravity, happens when the effects of gravity are not felt. Technically speaking, gravity does exist everywhere in the universe because it is defined as the force that attracts two bodies to each other. But astronauts in space usually do not feel its effects.
Complete step-by step answer:
We should keep in mind that since g is calculated using only constants, g is a constant. where Re is the radius of the earth. As earth is not a perfect sphere, the value of gravity g is not a constant at all the locations on the surface of the earth. Therefore, for practical purposes we take acceleration due to gravity as a constant.
We should be knowing that the acceleration due to gravity is always negative. Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of
It is seen that the first the assertion says that acceleration due to gravity does not depend on mass of the body it is true as because if we drop an egg and a watermelon from same height at same time both will hit the ground at the same time so Assertion is true but the reason acceleration, due to gravity is constant quantity is false because gravitational force depends on a separation which is not constant.
Hence, the correct answer is Option C.
Note: It should be known to us that acceleration is the rate of change of velocity with time. As the velocity is a constant value over all the values of time, the rate of change of velocity is thus zero. So, acceleration is zero. So, zero acceleration and non-zero velocity are possible for particles moving with constant velocity. In the case of the earth, the force of gravity is greatest on its surface and gradually decreases as you move away from its centre as a square of the distance between the object and the centre of the Earth. Of course, the earth is not a uniform sphere so the gravitational field around it is not uniform.
On the other hand, the sensation of weightlessness, or zero gravity, happens when the effects of gravity are not felt. Technically speaking, gravity does exist everywhere in the universe because it is defined as the force that attracts two bodies to each other. But astronauts in space usually do not feel its effects.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
EMI starts from ₹3,487.34 per month
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Chemical Properties of Hydrogen - Important Concepts for JEE Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Uniform Acceleration

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Degree of Dissociation and Its Formula With Solved Example for JEE

Electrical Field of Charged Spherical Shell - JEE

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

Units and Measurements Class 11 Notes: CBSE Physics Chapter 1

Motion in a Straight Line Class 11 Notes: CBSE Physics Chapter 2

JEE Advanced 2025: Dates, Registration, Syllabus, Eligibility Criteria and More

NCERT Solutions for Class 11 Physics Chapter 1 Units and Measurements

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry
