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A students throws softballs out of the windows at different angle to the horizontal . All softballs have the same initial speed v=10√3 m/s. It turns out that all soft balls landing velocities make angle 30°or greater with the horizontal.F ind the height h in metre of the windows above the ground.

A  students throws  softballs out of the windows at different angle to the horizontal . All softballs have the same initial speed v=10√3 m/s. It turns out that all soft balls landing velocities make angle 30°or greater with the horizontal.F ind the height h in metre of the windows above the ground.

Grade:11

1 Answers

harshin nechooli
121 Points
5 years ago
and 5m here I think the question means the angle with positive x-axis or horizontal otherwise you could throw it vertically downwards I mean within a minus 90 degree with horizontal then it will get directly download so we have to be aware that the angle is made with positive horizontal then the question comes of minimum angle and for that you can draw and sample image pictures then you will find that the menu angle is made when theta is 0 with horizontal and then you can equate tan theta equal to vertical velocity divided by horizontal velocity and since theta is zero horizontally velocity is 10 root 3 and from there using tan theta you get vertical velocity 10 and now you get height to be 5 metre

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