Answer to Question #206815 in Mechanical Engineering for Rodel

Question #206815

A ball is thrown with an initial horizontal velocity of 30 m/s from a height of 3m above the ground and 40m from a vertical wall. How far from the wall will the ball rebound for the first time? 


1
Expert's answer
2021-06-21T05:52:16-0400

"v_x = 30m\/s\\\\\nh = 3m\\\\\nx= 40m\\\\"


"v\u00b2 = u\u00b2+ 2as\\\\\nv_x\u00b2 = u_x\u00b2 + 2a_xx\\\\\nv_\u00b2 = 30\u00b2 + 0\\\\\nv_x = 30m\/s"


"t = \\dfrac{x}{v_y}= \\dfrac{40}{30} =1.33s"


"y = u_yt+ \\frac{1}{2} a_yt\u00b2\\\\\ny = 0(1.33) + \\frac{1}{2}(10)(1.33)\u00b2\\\\\ny = 8.89m"

The ball would have fallen before it got to the wall.


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Comments

Assignment Expert
23.06.21, 12:57

Dear Rodel,

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Rodel
22.06.21, 20:00

Thank you!

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