zenith trench
for this question could u not To get equation resolve
vertically when particle reaches its maximum
height of 42 m, then find the time where the ball hits the ground after that findng horizontal veloctiy if terms of Ucos then use tan to find alpha then solve to find the rest
uncut nebula
the time taken to reach max height is not the same as the time taken to travel 196m horizontally. it will be 2 times the time taken to reach max height
i think you have used the time taken to reach max height to find alpha but you have to use twice that time instead
errant robin
i wrote 2 equations for the two separate motions and found alpha using tan
then i subbed that value into the max height formula
dk if its right tho