Projectile Velocity/?

Question

A projectile is projected from the origin with a velocity of 10.0 m/s at an angle of 30 degrees above the horizontal. What is the velocity of the projectile 2.0 seconds later?

a. Vx= 8.7 m/s, Vy= -14.6 m/s

b. Vx= 14.6 m/s, Vy= -5.6 m/s

c. Vx= -8.7 m/s, Vy= -14.6 m/s

Answer 1

For this use vix = vi*cos(θ) for the x-component and viy = vi*sin(θ) for the y-component.

The final velocity formula is vf = vi + at. Plug in the values and find the answer.