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Answer to Question #68435 in Mechanics | Relativity for DEEPENDRA SINGH

Question #68435
A ball is left from the top of a building. A window is in the building the ball is cross the window in 0.5 second. The length of the window is 3 meter. If the speed of the ball at the top of the window is Vt and the bottom of the window is Vb( g=9.8) then which option is right =
1.Vt+Vb=12 meter per second
2.Vt-Vb=4.9 meter per second
3.VtVb=1 meter per second
4.Vb/Vt=1 meter per second
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