Mechanics (Applied) Flashcards
How do you calculate the force on the pulley in a pulley system?
2T (2 x Tension)
What is the formula for a clockwise moment of F about P
F x d
What is the unit of a moment?
Nm
What is a resultant moment?
The sum of the moments acting on a body
What are coplanar forces?
Forces that act on the same plane
What happens to the resultant force when a body is in equilibrium?
It is 0N
What can be said about the moments of a body in equilibrium?
The sum of the clockwise moments is equal to the sum of the anti-clockwise moments
What is the reaction at any other support when a body is on the point of tilting about a pivot?
It is zero
What does the limiting value of friction depend on (2 things)
● The normal reaction R between the two surfaces
● The roughness of the two surfaces
How is roughness measured?
Using the coefficient of friction (μ)
What is the equation for the limiting value of friction?
F-max = μR
