With what minimum horizontal velocity (u) can a boy throw a rock at A & have it just clear the obstruction at B? Refer fig.

1.7kviews

written 8.9 years ago by

teamques10 ★ 70k

modified 3.8 years ago by

pedsangini276 • 4.8k

enter image description here

Mumbai University > FE > Sem 1 > Engineering Mechanics

Marks : 04

Years : MAY 2015

engineering mechanics

ADD COMMENT EDIT

1 Answer

35views

written 8.9 years ago by

teamques10 ★ 70k

Let A be the origin.

Hence $A = (0,0)$

Hence, $B = (40,- 4)$ (from the figure)

Hence, $x = 40; y = -4$

As seen from the figure, rock is thrown horizontally. Hence, $α = 0$

Using equation of path,

$Y= x \tan α – 4.9 x^2/ (u \cos …

Create a free account to keep reading this post.

and 3 others joined a min ago.

ADD COMMENT EDIT

Please log in to add an answer.