Physics problem ..i need the solutions...

Question

a horse and its rider jump over an obctcle 2.3m high while covering a horizontal distance of 10m. at what angle and with what speed did the horse leave the ground?

Answer 1

Draw a right triangle.   The base is 10 m, the vertical side is 2.3 m.  Using the trig ratio of tangent (opposite/adjacent, 2.3/10), you can find tan of 0.23 and that will give you the angle. (13 degrees)

The horse was in the air as long as it took to rise, or fall, 2.3 m.  This is basically a projectile problem, but it can be solved by thinking of it as a free fall.

Use vf^2 - vi^2 = 2ad to get your velocity.  Assume the horse is falling 2.3 m from rest, so initial velocity is zero.  So final velocity will be the square root of 2 x 9.81 m/s^2 x 2.3 m.

I got 6.7 m/s.