To throw a discus, the thrower holds it with a fully out-stretched arm. starting from rest, he begins to turn with a con-stant angular acceleration, releasing the discus after making one complete revolution. the diameter of the circle in which the discus moves is about 1.8 m. if the thrower takes 1.0 s to complete one revolution, starting from rest, what will be the speed of the discus at release?

11.3m/s

Explanation:

We can find the solution through the rotational motion of the discus,

Where,

Solving to find ,

Therefore we can find the final angular velocity, through the rotational motion equation given by,

Substituting,

The diameter of the circle is 1.8m, then the ratio will be the half, i.e,

The relation between linear velocity and angular velocity is

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000