Angular Momentum

Question 1

momentum

Answer 1

systems resistance to change

Question 2

p = mv

Answer 2

linear momentum

Question 3

L=Iw

Answer 3

L= angular momentum
I= rotational inertia (moment of inertia)
w= angular velocity

Question 4

speed of turning

Answer 4

angular velocity

Question 5

resistance to turning

Answer 5

rotational inertia

Question 6

I=mr^2

Answer 6

distribution of mass relation to axis of rotation (pivot point)

Question 7

pivot point

Answer 7

relation to r

Question 8

mass further away from pivot point

Answer 8

increases the moment of inertia, therefore decreasing angular velocity

Question 9

putter

Answer 9

mass distributed either side of the longitudinal axis, less likely to rotate

Question 10

running, bringing heel up

Answer 10

CG is reduced, the moment of inertia is also reduced

Question 11

conservation of momentum

Answer 11

analogue of newtons 1st law, keep turning unless an external couple or eccentric force is applied

Question 12

if there is no external forces are applied to a turning object, and the radius is decreased . . .

Answer 12

then the moment of inertia would decrease resulting in an increase in angular velocity

Question 13

zero-angular momentum twists

Answer 13

action-reaction- happens at the same time, opposite direction
move body through an angle, doesn’t initiate continuous rotation

Question 14

successful transfer of momentum

Answer 14

direction of rotation the same
momentum stays constant
part rotating must stop rotating for the transfer to occur

Question 15

transfer of momentum

Answer 15

same direction, different time

Question 16

T=I x alpha

Answer 16

T = net torque
I = rotational inertia
alpha = angular acceleration