Projectile Motion: How Far Will a Seed Travel at a Given Angle and Velocity?

[runningirl]

Homework Statement

You spit a seed from a height of 1.4 m above the ground, at a velocity of 3.0 m/s at an angle of 20 below the horizontal. How far from you does it land?

Homework Equations

vxo= vo(cos20)
vyo=vo(sin20

The Attempt at a Solution

not sure where to start..

 

[J.live]

Break the overall velocity into x and y components.

x direction <=> 3cos(20) = ?

y direction <=> 3sin(20) = ?

Use quadratic equation to find the overall time.

0= 1/2 (9.8)t^2 ( value for a) + 3sin(20)t (value for b) + 1.4 (value for c)

Total distance traveled can be calculated by ( 3cos(20) x ( overall time))

P.S. Next time , at least try to initiate the attempt.

Good luck.