Unit 7: Torque and Rotational Motion Flashcards
1
Q
rotational velocity
A
w (rad/sec); w= v/r
2
Q
rotational inertial
A
I=mr^2; kgm^2
3
Q
quantity that causes rotational acceleration
A
net torque
4
Q
Newton’s 2nd law (rotational)
A
Jnet=Iα
5
Q
total mechantical energy
A
TME=Kr+Kt+PE
6
Q
rotational momentum
A
L=Iw (kg^2m/s)
L=rcosø
7
Q
impulse momentum theorem rotational
A
IoWo=IfWf
8
Q
rotational acceleration
A
α=v/I or α=F/m
9
Q
to “balance a scale”
A
Frsinø=Frsinø
10
Q
how will mass a mass moving to the axis of its rotation effect inertia?
A
less inertia and more α
11
Q
torque
A
forces apply torques that cause α
not a force
Nm
J=Frsinø
12
Q
rotational equuilibrium
A
Jnet=O
no α
13
Q
conservation of angular momentum
A
if no net toque than, Li=Lf, angular momentum is conserved
