Physics: a rock thrown horizontally

Physics
Tutor: None Selected Time limit: 1 Day

Feb 25th, 2015

Vx does not change in a projectile motion, and Vy = Vy0-gt = -2*9.8=19.6 m/s , the magnitude of V is 

V = sqrt(Vx^2Vy^2) = sqrt(20^2+19.6^2) ~ 28 m/s 

A) 

Feb 25th, 2015

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