User Noumeno

40 votes

Why is acceleration directed inward when an object rotates in a circle?

answered Dec 13, 2020 at 15:19

30 votes

Why do we need instantaneous speed?

answered Jan 3, 2021 at 14:21

22 votes

Does a rotating rod have both translational and rotational kinetic energy?

answered Dec 9, 2020 at 18:02

21 votes

Why is angular momentum a vector?

answered Jun 10, 2021 at 14:52

10 votes

How does a satellite maintain circular orbit?

answered Dec 16, 2020 at 14:17

8 votes

How does the second law of thermodynamics function when a system is at maximum entropy?

answered Jun 23, 2021 at 12:49

7 votes

Why is the photon clock equivalent to all clocks?

answered Aug 3, 2020 at 13:00

6 votes

Potential energy and force

answered Jun 15, 2021 at 9:29

5 votes

Does all EM radiation consist of photons?

answered Jan 10, 2021 at 10:57

4 votes

Why did water not drip form this small bottle?

answered Dec 30, 2020 at 13:25

4 votes

Inertial and non-inertial frames in classical mechanics

answered Dec 31, 2020 at 13:19

4 votes

Accepted

What is the cause of electric force?

answered Dec 14, 2020 at 15:18

4 votes

Accepted

Questions regarding particle spin

answered Mar 11, 2021 at 9:49

4 votes

Why we add the individuals quantities to find the total amount of a system's "quantity"? Is this by definition of "total"?

answered Jul 16, 2020 at 16:16

4 votes

Does electric field obey the triangle law of vector addition and subtraction?

answered Sep 7, 2020 at 9:58

4 votes

Accepted

Do time dilation and length contraction cancel out?

answered Dec 13, 2020 at 13:11

2 votes

Do all impossible processes disobey certain conservation laws?

answered Jun 5, 2021 at 10:34

2 votes

What is the $y$-axis in an electromagnetic wave?

answered May 21, 2021 at 9:22

2 votes

What is the work done by gravitational force when you lift an object?

answered Dec 15, 2020 at 9:15

2 votes

Why can ropes pull but not push?

answered Dec 16, 2020 at 16:07

2 votes

How was it found that a charge produces an electric field rather than a 'local' electric force?

answered Jun 23, 2021 at 11:44

1 vote

How do electrical devices limit the current flow from a socket?

answered Jun 14, 2021 at 16:37

1 vote

Accepted

Relationship between voltage and distance in electrodynamics

answered Jun 17, 2021 at 10:48

1 vote

Would there be any gravity inside a hollow planet made of a spherical shell of basalt crust?

answered Dec 15, 2020 at 9:43

1 vote

Why the gravitational potential energy at infinity is zero?

answered Jun 3, 2021 at 15:26

1 vote

Definition of a joule

answered May 11, 2021 at 10:26

1 vote

Is my intuitive understanding of physical infinity correct?

answered May 21, 2021 at 8:39

1 vote

Accepted

Does electrostatic force act at the centre of mass of a body?

answered Dec 14, 2020 at 10:39

1 vote

Meaning and validity of the mass-energy equivalence valid if we don't know the one-way speed of light?

answered Dec 6, 2020 at 14:53

1 vote

Accepted

Potential energy of a particle moving in a circle

answered Dec 6, 2020 at 15:54

Stack Exchange Network

47 Answers

Why is acceleration directed inward when an object rotates in a circle?

Why do we need instantaneous speed?

Does a rotating rod have both translational and rotational kinetic energy?

Why is angular momentum a vector?

How does a satellite maintain circular orbit?

How does the second law of thermodynamics function when a system is at maximum entropy?

Why is the photon clock equivalent to all clocks?

Potential energy and force

Does all EM radiation consist of photons?

Why did water not drip form this small bottle?

Inertial and non-inertial frames in classical mechanics

What is the cause of electric force?

Questions regarding particle spin

Why we add the individuals quantities to find the total amount of a system's "quantity"? Is this by definition of "total"?

Does electric field obey the triangle law of vector addition and subtraction?

Do time dilation and length contraction cancel out?

Do all impossible processes disobey certain conservation laws?

What is the $y$-axis in an electromagnetic wave?

What is the work done by gravitational force when you lift an object?

Why can ropes pull but not push?

How was it found that a charge produces an electric field rather than a 'local' electric force?

How do electrical devices limit the current flow from a socket?

Relationship between voltage and distance in electrodynamics

Would there be any gravity inside a hollow planet made of a spherical shell of basalt crust?

Why the gravitational potential energy at infinity is zero?

Definition of a joule

Is my intuitive understanding of physical infinity correct?

Does electrostatic force act at the centre of mass of a body?

Meaning and validity of the mass-energy equivalence valid if we don't know the one-way speed of light?

Potential energy of a particle moving in a circle