Question

A projectile is projected with initial velocity of 60 m/s at an angle of 60°.Find the time after which angle of velocity becomes 45°​

Answer 1

ux = 30m/s = vx

uy = 30$\sqrt{3}$

at 45 angle vx = vy = 30

use kinematic equation in vy

vy = uy-gt

find t, this is your ans