Lecture 2 - Maths and Mechanics (ADD RIGHT HAND RULE) Flashcards
1
Q
what is the equation for sin
A
sin (0)= o/h
2
Q
what is the equation for cos
A
cos(0) = a/h
3
Q
what is the equation for tan
A
tan (0) = o/a
4
Q
what equation can be used when just the sides are given of a right angle triangle
A
c2 = a2 + b2
5
Q
what can vectors be described in terms of
A
in terms of vertical and horizontal components
6
Q
vectors have ….
A
magnitude and direction
7
Q
how do we find the overall affect of forces on segments
A
add the forces
8
Q
if forces are parallel and act along the same line we can …..
A
add them algebraically
9
Q
explain how to work out right hand rule in and out of the page
A
- put right hand at the axis of rotation
- follow the direction of force
- curl hands in direction of force
- stick out thumb
- thumb points with the direction of torque ( out of the page = positive, into the page = negative
