Question

Please Ans the second part of question no 19 please I am in a hurry

Answer 1

u^2 - 0^2= 2 x10 x15

so u = 10 root 3 m/s

also time taken to go up :

0 = 10 root3 -10 t

t = root 3 seconds

so time taken to come from top to bottom is also

root 3 second

hence total time to come down= 2root3 second