Rotational Dynamics

Question 1

Torque

Answer 1

Turning effect of a force.

Question 2

Torque equation (when perpendicular)

Answer 2

T=Fr
Where T is torque in Nm
F is force in N and r is distance from axis of rotation

Question 3

Torque equation when at an angle to object

Answer 3

T = FrsinØ
Where Ø is angle between object and force

Question 4

Torque in equilibrium

Answer 4

T= [E] opposing torques

Question 5

Force and angular acceleration equation

Answer 5

F=mra
F is force in N
m is mass in kg
r is radius in m
a is angular acceleration in rads^-2

Question 6

Moment of inertia unit and symbol

Answer 6

I and kgm^2

Question 7

Torque and inertia equation

Answer 7

T=Ia
Where T is torque in Nm
I is inertia in kgm^2
and a is angular acceleration in rads^-2

Question 8

Moment of inertia and radius equation

Answer 8

I = mr^2
Where I is moment of inertia in kgm^2
m is mass in kg
r is radius in m

Question 9

For collection of masses total moment of Inertia ie equal to

Answer 9

Sum of all the moments of inertia

Question 10

What happens when an unbalanced torque is applied to an object

Answer 10

It will cause a change in the rotational motion of an object.

Question 11

Definition of moment of inertia

Answer 11

a measure of an objects resistance to angular acceleration about a given axis.