In this lesson, we will learn:
- What is tension?
- How to calculate tension
- Problem solving with tension
Newton's Second Law
- Tension is the force of a rope (or string, cable, etc.) pulling on an object.
- Tension is always a pulling force: a rope can't push!
- There is no formula for tension. Tension force acting on an object must be calculated from Newtons' second law.
- If the rope is assumed to be massless and non-stretchy, then the pulling force at either end of the rope must be equal in magnitude.
sum of all forces, in newtons (N)
net force, in newtons (N)
mass, in kilograms (kg)
acceleration, in meters per second squared
Newton's Third Law
For object A exerting a force on object B:
force A is exerting on B, in newtons (N)
force B is exerting on A, in newtons (N)
Atwood Machine Equation
acceleration of masses, in meters per second squared
acceleration due to gravity, in meters per second squared ()
mass of first hanging mass, in kilograms (kg)
mass of second hanging mass, in kilograms (kg)