L31a - Remember:ThisWeek Read Ch. 8: And read Dr. Dubsons...

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Remember: This Week Read Ch. 8: And read Dr. Dubson’s excellent notes on Ch. 8 ASAP. CAPA assignment #11 is due this Friday at 10 PM, to be done on -line. Face-Book CAPA Group: CAPA2010. Lab 5 this week: Rotational Dynamics. Do Pre-Lab, print & bring it and the Lab Manual to your Lab Session. Don’t Forget: 3 rd mid-term exam next Tuesday evening at 7:30 PM: CH. 6 Energy CH. 7 Momentum CH. 8 Rotational Motion. L31 W 3/31/10 1 Physics 2010
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CH. 8: Extra QuesAons & Problems Questions: 5, 9, 13. Problems: Angular Quantities: 4, 8, 11 Constant Angular Acceleration: 16, 19 Torque: 23, 25, 26 Rotational Dynamics: 27, 29, 33, 35 Rotational KE: 45, 47 L26 F 3/13/09 2 Physics 2010
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L31 W 3/31/10 Physics 2010 3 Rotational Kinematics Describing rotational motion = a tan r = v r = 2 π τ = 2 f IC angle of rotation (rads) angular velocity (rad/s) angular acceleration (rad/s 2 ) torque (N m) moment of inertia (kg m 2 ) Newton’s 2 nd Law Monday Δ KE + Δ PE = constant Δ KE trans + Δ KE rot + Δ PE = constant (Conservation of Mechanical Energy)
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L31 W 3/31/10 Physics 2010 4 Torque and Moment of Inertia r r θ s F F A Consider the work done by a constant force in moving an object from point A to point B. F W = = F s = F ( r θ ) = ( rF ) = τθ (Component of force along displacement) x displacement τ≡ rF
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L31 W 3/31/10 Physics 2010 5 A mass is hanging from the end of a horizontal bar which pivots about an axis through its center. The bar is released and begins to rotate due to gravity.
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L31a - Remember:ThisWeek Read Ch. 8: And read Dr. Dubsons...

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