Question

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Answer 1

Vy=Voy-gt
Vy=Vosintheta-gt
Vy=40sin45-(9.8)(5)
Vy=-20.7m/s

Vx=Vox=Vocostheta
Vx=28.8m/s

V^2=Vy^2+Vx^2
V^2=(-20.7)^2+(28.8)^2
V=35m/s

Answer 2

Vy=Voy-gt

Vy=Vosinθ-gt

Vy=40sin45-(9.8)(5)

Vy=-20.7m/s

Vx=Vox=Vocosθ

Vx=28.8m/s

V^2=Vy^2+Vx^2

V^2=(-20.7)^2+(28.8)^2

Hence the velocity after 5 seconds V=35 m/s