Question

Need the step-by-steps for the problems below

Problem 1 2/11 Ball s launched with an initial vertical veloc- 01, 02 ity 160 ft/sec. Three seconds later, bal 2 is launched with an initial vertical velocity Deter- mine v if the balls are to collide at an altitude of 300 ft. At the instant of collisin is ball 1 ascending or descending? Problem 2 2/25 Small steel balls fall from rest through the open- ing at A at the steady rate of two per second. Find the vertical separation h of two consecutive balls when the lower one has dropped 3 meters. Neglect air resistance Problem3 a, m/s A subway train travels between two of ts station stops with the acceleration schedule shown. Deter- mine the time interval ?t during which the train brakes to a stop with a deceleration of 2 m/s2 and find the distance s between stations.

Answer 1

-23 2Y 32-1522 s-398 loG ft 32 IS2 t = 4.746 sec a32 IS 22 또, A( rdirynto cheFS.ru les g

f= 3 sec