UNIT 6 Rotational Motion & Angular Momentum Rotational Dynamics, Inertia and Newton’s 2 nd Law for Rotation.

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Presentation transcript:

UNIT 6 Rotational Motion & Angular Momentum Rotational Dynamics, Inertia and Newton’s 2 nd Law for Rotation

TORQUE Torque is how we describe a force that causes an object to rotate. What does torque DO? The same things that force does, in a circle.

ROTATIONAL DYNAMICS CARD!

FOR A RIGID BODY: I

NEWTON’S 2 ND FOR ROTATION CARD! Force analog Mass analog Angular acceleration

Depends on the mass distribution of the object. MOMENT OF INERTIA

1.Determine axis of rotation 2.Identify forces and distances from the axis 3.Identify torques and their signs 4.Find I for the object 5.Apply rotational kinematics as needed USING NEWTON’S 2 ND FOR ROTATION

ROPES AND PULLEYS:

EXAMPLE: