Question

A projectile is thrown with a velocity of 40 m/s, 45 degrees above the +x-axis. Determine its initial x-velocity and its initial y-velocity.

Answer 1

x-component is V·cos(angle)

y-component is V·sin(angle)

When the angle is 45°, its sin and cos are both 1/2·√2 .

Vx = 20·√2 = 28.28 m/s

Vy = 20·√2 = 28.28 m/s