Question

A discus thrower achieves a high throw of 100m with the discus released at an angle of 30° calculate the initial speed of the discuss.​

Answer 1

Answer:

u = 88.54 m/s

Explanation:

Given that,

A discus thrower achieves a high throw of 100 m.

Angle of projection is 30°

We need to find the initial speed of the discuss.​ It is a cse of projectile motion. The maximum height reached by the discus is given by :

$H=\dfrac{u^2\sin^2\theta}{2g}$

u is the initial speed of the discus

So,

$u^2=\dfrac{2\times 9.8\times 100}{\sin^2(30)}\\\\u=\sqrt{7840}\\\\u=88.54\ m/s$

So, the initial speed of the discus is 88.54 m/s.