Phy121 Test 3 Notes

# Phy121 Test 3 Notes - of paper or negative into the paper...

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PHY21 Test #3 Review Rocket Propulsion Application Result: P 2 =(v+dv)(m+dm)+(-dm)(v-v exausted )=P 1 =mv Rearrange: dv=(- v exausted /m)(dm) a=- (v exausted /m)(dm/dt) Rotational Dynamics/Kinematics Rigid bodies (neglect deformations) 1 Revolution = 2π = 360 degrees o 1 rad = 360 degrees/2π = 57.3 degrees Angular Displacement/ time = angular velocity o Rad/s, degrees/s, revolutions/s Direction of Angular Velocity o Use right hand rule: Angular velocity points in direction of thumb (either positive, out

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Unformatted text preview: of paper, or negative, into the paper, direction along z-axis Use tip of arrow (.) or tail of arrow (x) to describe direction of velocity • Angular Acceleration (rad/s^2) (Ex 9.1/Ex 9.2/Ex 9.3) o Angular velocity/time = angular acceleration • Linear laws of kinematic motion apply to rotational kinematics at=r(alpha) ar=v^2/r = (rw)^2/r = w^2*r w = 10 rad/s r = 80cm alpha = 50 rad/s^2 March 31, 2011 Tip of plane problem Ex 9.8...
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## This note was uploaded on 08/30/2011 for the course PHY 121 taught by Professor Pushpa during the Spring '11 term at Arizona.

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Phy121 Test 3 Notes - of paper or negative into the paper...

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