posted by nam maurer .
A projectile is shot from the ground at an angle of 60 degrees with respect to the horizontal, and it lands on the ground 5 seconds later. Find:
a. the horizontal component of initial velocity
b. the vertical component of initial velocity
c. initial speed
Let Vyo be the initial vertical velocity component. It equals g times half the time of flight. Lex Vx be the horizontal velocity component, which is constant while in flight.
b. (1/2)*g*5 sec = Vyo = 24.5 m/s
a. Vyo/Vx = tan 60 = 1.732
Vx = 14.14 m/s
c. Vo = sqrt[(Vx^2 + Vyo^2]