All Questions
9
questions
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2
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What is the difference between work done against gravity and work done by gravity?
Work done "BY" a force,from my understanding,is:
•positive when the direction of displacement is same as the direction of force.
•negative when the direction of displacement is opposite to ...
- 57
3
votes
4
answers
148
views
What is actually weight?
When a book is kept on the table than gravity of earth is attracting the book downwards and gravity of book attract earth this is action reaction pair
Now here are two more force acting normal ...
0
votes
4
answers
2k
views
What's the difference between gravitational force and gravitational constant?
I was told that the gravitational constant is the pulling force between two objects in a distance with mass. Though, doesn't that have the same definition as a gravitational force? I know they're ...
- 11
2
votes
3
answers
159
views
Weight in Newtonian mechanics
What do we mean by the term weight? Is it an upward force exerted by an object to counteract the downward force of gravity (or) is it the downward force itself? Is the magnitude of the weight always ...
- 105
1
vote
2
answers
118
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What do we understand by a force being central?
Gravity is said to be a central force. But the resultant force field of multiple bodies is no longer central as it has many attraction points.
My Doubts:
Is the idea of a force being central ...
2
votes
1
answer
169
views
Definition of "tidal forces"
May anyone give me definition of tidal forces? Topic is related to force between two celestial bodies which are tidally locked. I have never heard for such force. Here is quotation which is intriguing ...
- 21
1
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3
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1k
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What's the difference between gravitational attraction and weight? [duplicate]
What exactly is gravitational attraction? In my textbook it was quoted " all objects both tiny and large objects are attracted to the earth. This is known as gravitational attraction, or the force due ...
- 117
0
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2
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1k
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How has the definition of gravitational potential energy been derived?
The definition of gravitational potential energy is - The gravitational potential energy of an object at a point above the ground is defined as the work done is raising it from the ground to that ...
5
votes
2
answers
700
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Question about inertial mass and gravitational mass
I know that inertial mass $m_i$ is the quantity that appears in Newton's second law: $F=m_ia$ and that gravitational mass $m_{g_1}$ is the quantity that appears in Newton's gravitational law: $F_g=Gm_{...
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