Physics Help Forum Question ?

 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

 Jun 5th 2017, 05:48 AM #1 Junior Member   Join Date: Apr 2017 Location: Turkey Posts: 20 Question ? Hello again my friends As i told you before about my studying Physics using " Physic for Scientists and Engineers" book , i have found this question in page 245 . question No. 51 I tried to solve it , but i could not , could any one help me to solve it ? i will thankful for him . Attached Thumbnails
 Jun 5th 2017, 07:42 AM #2 Physics Team     Join Date: Jun 2010 Location: Morristown, NJ USA Posts: 2,280 Start by determining the velocity of the pumpkin as a function of theta. From energy principles, $\displaystyle v^2 = \sqrt {2g \Delta h}$, where $\displaystyle \Delta h$ is the vertical height that the pumpkin descends: $\displaystyle \Delta h = R(1-\cos \theta)$. Next determine the radial acceleration of the pumpkin as a function of theta, based on $\displaystyle a_r = v^2/R$ Finally, recognize that the pumpkin loses contact when the radial acceleration exceeds the component of acceleration due to gravity (g) that operates in the radial direction, which is $\displaystyle g \cos \theta$. Can you take it from here?
 Jun 7th 2017, 02:09 AM #3 Junior Member   Join Date: Apr 2017 Location: Turkey Posts: 20 Dear friend ChipB Thanks for your replay and also for your hint , now i have solved the problem . Many thanks Best regards Razi

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