Tagged: forces
-
-
July 31, 2020 at 1:47 pm
Karthik R
AdministratorWhy does the total sum of forces acting on a system always have to be equal to zero?
-
July 31, 2020 at 1:48 pm
Keyur Kanade
Ansys EmployeeHi!
The total sum of forces acting on a system is equal to zero only if it is not accelerating i.e. it is in a static equilibrium. This is a consequence of the conservation of linear momentum law.
-
July 31, 2020 at 1:48 pm
Karthik R
AdministratorThank you for the answer. Could you please explain what linear momentum is? And how does it lead to the condition that when a body is in static equilibrium the sum total of all forces acting on it should be zero?
-
July 31, 2020 at 1:48 pm
Keyur Kanade
Ansys EmployeeThe linear momentum is defined as p=mv, where p is the linear momentum, m is the system mass, and v is the velocity. We can have conservation of linear momentum as long as the linear momentum stays constant in time. If you differentiate both sides of the above equation wrt time you would get dp/dt = m*dv/dt = m*a. Since dp/dt=0 for an isolated system for the momentum to be conserved, then m*a=force=0 i.e. net force on an isolated system has to be equal to 0.
-
- You must be logged in to reply to this topic.

Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- What is the difference between internal and external flows?
- How do you define specific gravity? What is its significance???
- Why is it much easier to roll a log than drag a wood cube with the same mass?
- The level of water inside the straw was higher than the level of water in the beaker
- What is the surface tension of a fluid?
- How to gain research experience?
- Whats the difference between sensible heat and latent heat?
- Cell Counting?
- Why does the total sum of forces acting on a system always have to be equal to zero?
- Why ice floats on water
-
2706
-
2142
-
1357
-
1144
-
462
© 2023 Copyright ANSYS, Inc. All rights reserved.