In a training session, an athlete throws a ball vertically upwards with a speed of 22 m / s, calculates the following unknowns: a) How high did he climb in the third second? b) What speed will it take in the same time?
c) What was the maximum height reached?
d) How long does it take to go up?
e) How long does it last in the air?
help pls and thank you

Acar travels 40m in 8 seconds find the car speed

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.

The star nearest to our sun is proxima centauri, at a distance of 4.3 light-years from the sun. how far away, in km, is proxima centauri from the sun?