//usq4Stut mon/TakeTutorialAssignment.asp Q Chapter 19 Flashcare : EBookpdf. Goo
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//usq4Stut mon/TakeTutorialAssignment.asp Q Chapter 19 Flashcare : EBookpdf. Google t SampleProblemsan D MyPhlosophyou, Potential Energy and Energy Coservation Begin Date: 8282017 100000 AM Due Date: 1o15/2017 11 59.00 PM End Date 2/22/2017 6.0000 PM 0%) Problem 9: A ball s suspended hom a light 1.5 m string as shoan The string makes an ample of 22 degres with the vertical. The ball is then kicked, and given an nitial velocity 1.2 m's straight upward re lor 50% Part (a) what ill be the speed, in meters per second, ofthe ball when reaches its lowest poste,or Status Grade Sammary Commpleted Patial Degrees Radians 12 EnterExplanation / Answer
a)speed of the ball
v = sqrt [v'2 + 2 g l(1 - cos 22)]
= sqrt [1.22 + 2 * 9.8 * 1.5[1- cos 22]]
v = 1.89 m/s
b) vb2 = 2 g l [1 - cos thetamax]
thetamax = cos-1 [1 - vb2/2gl]
= cos-1 [1 - 1.892/2*9.8*1.5]
maximum angle = 28.54 deg
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