t seconds after a certain projectile is launched from the ground, it has a vertical upwards velocity component of 69.0 - 9.80t m/s. Given that is has a constant horizontal velocity component of 15.0m/s, find it's velocity (i.e its speed and direction of motion): 2 seconds after launch and 7 seconds after launch. (state direction as angles made with horizontal)
Please help with the answer!!!