revisiting newtons laws Flashcards
1
Q
Which principal axis of rotation has the greatest moment of inertia in the anatomical position?
A
2
Q
moment
A
turning effect or torque
3
Q
moment arm
A
dist from ax of rot to where force applied
4
Q
moment of inertia
A
how difficult it is to change rotation of object, larger moment of inertia = harder to change
5
Q
principle moment of inertia
A
resistance to change of rotational force
6
Q
axis of gyration
A
line passes through centre of mass of system (think of the hammer slide)
7
Q
A
8
Q
difference between torque and force
A
force = newtons - ability to accelerate 1kg at rate of 1m/s^2
torque = Newton meter = 1 newton of force applied perpendicularly to a moment arm 1 meter long
