Reference-frames tutorials, questions, and resources

Can you sum moments about a point not on the object?

January 27th, 2023

forces torque rotational-dynamics reference-frames

Screw falling in an elevator

July 23rd, 2022

reference-frames homework-and-exercises newtonian-mechanics

When is an object at rest?

September 29th, 2022

reference-frames velocity definition

Time difference between two moving inertial frames of reference

September 22nd, 2022

homework-and-exercises special-relativity reference-frames inertial-frames time-dilation

Do the laws of physics that apply to all observers also apply to a non-observer?

August 31st, 2022

visible-light special-relativity reference-frames speed-of-light

Why Sun light can reach us if Time is dilating?

February 6th, 2021

time reference-frames speed-of-light special-relativity observers

What happens to the momentum of earth-ball system when a ball is thrown upwards?

January 1st, 2021

homework-and-exercises conservation-laws momentum newtonian-mechanics reference-frames

Difference between velocity vectors, relative speed

May 22nd, 2020

velocity reference-frames

Finding the moment of inertia through superposition?

April 17th, 2021

reference-frames rotational-dynamics moment-of-inertia rigid-body-dynamics newtonian-mechanics

Two trains at the speed of light

August 20th, 2020

reference-frames speed-of-light special-relativity

Is it possible to tell whether the space ship is moving or not?

June 3rd, 2020

galilean-relativity reference-frames relative-motion

Is the Moon's Speed Greater than the Earth's?

February 21st, 2020

orbital-motion newtonian-gravity newtonian-mechanics speed reference-frames

Normal frames, locally inertial frame and freely falling frame?

January 29th, 2020

general-relativity reference-frames metric-tensor

Calculating the first cosmic velocity / velocity for a circular orbit

March 22nd, 2020

centrifugal-force centripetal-force reference-frames homework-and-exercises newtonian-gravity

What happens to momentum when a car crashes into a barrier?

March 2nd, 2020

conservation-laws newtonian-mechanics momentum reference-frames collision

Why do we say that the torque on Earth due to Sun is zero?

June 26th, 2020

rotational-dynamics reference-frames torque earth solar-system

Shape of a rotating fluid surface

February 11th, 2020

centripetal-force centrifugal-force reference-frames fluid-statics newtonian-mechanics

What is a moment?

October 7th, 2020

rotational-dynamics moment torque reference-frames

Rotating Observers in Special Relativity: Coriolis-like effect?

April 21st, 2021

coriolis-effect reference-frames special-relativity

Why are forces independent from the frame of reference?

August 1st, 2022

forces reference-frames galilean-relativity newtonian-mechanics

Do I have the correct idea of time dilation?

August 1st, 2022

special-relativity reference-frames time-dilation

A Basic Question about Gravity, Inertia or Momentum or something along those lines

July 15th, 2020

relative-motion inertia newtonian-mechanics reference-frames projectile

Mass hanging from spring in free fall

March 28th, 2021

spring newtonian-mechanics newtonian-gravity reference-frames free-fall

How can centre of mass be virtual?

August 13th, 2022

newtonian-mechanics reference-frames mass

Rotational relativity? Is there an universal frame of reference for rotation?

August 1st, 2022

universe reference-frames cosmology general-relativity machs-principle

Why don't two observers' clocks measure the same time between the same events?

August 1st, 2022

time special-relativity reference-frames time-dilation observers

Coordinates for FLRW metric

January 27th, 2020

cosmology general-relativity space-expansion coordinate-systems reference-frames

Coriolis force and Newton's third law

July 7th, 2020

newtonian-mechanics coriolis-effect reference-frames

A question about the Ehrenfest paradox

August 1st, 2022

reference-frames rotational-dynamics special-relativity

Time dilation - why the observers see each other the slow one but then one of them is older or younger?

August 1st, 2020

special-relativity general-relativity reference-frames observers

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