- #1
bettyboopxoxo143
what condition of forces must prevail for a body, acted upon by a number of forces:
1) to be equilibrium
2) not to be in equilibrium[?]
1) to be equilibrium
2) not to be in equilibrium[?]
Originally posted by bettyboopxoxo143
1) to be equilibrium
Originally posted by Tom
In addition to the "zero net force" condition, it also must be specified that opposing forces have the same line of action. Otherwise, you could have a force couple acting on an extended object. That would be zero net force, but a nonzero torque, which is not an equilibrium state.
An easy way to include this would be to add to Integral's answer:
1. ...and zero net torque.
2. ...or nonzero net torque.
A force is a push or pull that can cause an object to accelerate or change its direction of motion. It is a vector quantity, meaning it has both magnitude and direction.
The four main types of forces are gravitational, electromagnetic, strong nuclear, and weak nuclear. Other examples include tension, friction, and normal force.
Forces can cause an object to start moving, stop moving, or change its direction. They can also affect the speed and acceleration of an object.
To calculate the net force on an object, you need to add up all the individual forces acting on that object. This is known as vector addition, where forces in the same direction are added and forces in opposite directions are subtracted.
Newton's laws of motion describe how forces affect the motion of objects. The first law states that an object will remain at rest or in motion at a constant velocity unless acted upon by a net force. The second law relates the net force to the acceleration of an object. And the third law states that for every action, there is an equal and opposite reaction.