Week 9 Rotation of Rigid Bodies 1

Question 1

give the equation for tangential velocity in terms of rotational motion

Answer 1

vtan = riω

Question 2

give the equation for tangential acceleration in terms of rotational motion

Answer 2

atan = riα

Question 3

what is the moment of inertia

Answer 3

sum of mass of particles in a system multiplied by the square of the perpendicular distance from the axis of rotation

Question 4

define the parallel axis theorem

Answer 4

the moment of inertia about an axis through the centre of mass of an object is related to the moment of inertia about another parallel axis is given by the equation
I = Icm + Md^2

Question 5

what is the rotational energy equation

Answer 5

KE1 + U1 + Wother = K2 + U2

Question 6

define torque

Answer 6

angular force that acts on a rotating object

Question 7

what is the torque equation

Answer 7

T = rF

Question 8

what is the torque magnitude equation

Answer 8

T = rFsinθ

Question 9

what is the torque equation analogous to F = ma

Answer 9

T = Iα

Question 10

how do you calculate the net gravitational torque

Answer 10

calculated by considering the entire weight of the body to act through its CoM