Physics Help Forum Falling under Gravity

 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

 Mar 5th 2009, 12:56 AM #1 Junior Member   Join Date: Mar 2009 Posts: 8 Falling under Gravity A body falls from rest from the top of a towerk, and during the last sec, it falls 9/25 of the whole distance. Find the height of the tower in feet [ taking g = 32 ft/s*2 ]
 Mar 5th 2009, 08:24 AM #2 Physics Team   Join Date: Feb 2009 Location: India Posts: 365 let the whole distance be h covered in time t then the distance covered in time (t-1) sec will be h- 9h/25 = 16h/25. Now apply the formula s = ut + (1/2)gt^2 at time t and (t-1) In time t h = (1/2)gt^2 ..........( u being zero ) In time (t-1) 16h/25 = (1/2) g(t-1)^2 Devide the first eq by second one, find t and then find h using any of the two eqs.

 Tags falling, gravity

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post toyota11 Kinematics and Dynamics 1 Mar 15th 2012 11:54 AM Albionist Light and Optics 1 Nov 10th 2011 12:52 AM Eva Kinematics and Dynamics 25 Oct 12th 2009 12:09 PM climber123boy Advanced Mechanics 1 Mar 30th 2009 10:14 AM mustlP6 Kinematics and Dynamics 1 Feb 3rd 2009 07:57 AM