Mechanics Flashcards
Is a moment the same as torque?
Yes
The reaction force is always …. The the surface.
Perpendicular
What is a couple?
A couple is a pair of forces of equal size wich act parallel to each other but in opposite directions.
How is the torque of a couple calculated?
T=F x D
Torque (NM) = size of forces x distance Between THE line of action of the FORCES.
How to you spell m ?
Metres
What does the principle of moments state?
That for a body to be in equilibrium
The sum of the anticlockwise an clockwise moments around the same point.
Must be equal.
Centre of mass of an object is …
The point through which the objects weight appears to act.
An object will topple when
The line of action of an items weight falls outside the base area.
Suvat equations v= ?
V=u + at
Suvat equation v^2= ?
V^2=u^2 + 2as
Suvat equation u^2= ?
U^2=V^2-2as
What 2 SUVAT equations = s?
S =
S=(u+v)t / 2
S= ut+0.5at^2
SUVAT equations can only be used with…
Constant acceleration
When there is no acceleration what equation can be used for speed?
Velocity= distance\ time
Acceleration can be worked out using v &t by the equation…
Aceleration = change in velocity / change in time
