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## Homework Statement

An object is thrown horizontally and after 3 seconds the speed vector forms the angle pi/4 radians with the horizontal direction. FInd the speed after 4 seconds.

## Homework Equations

v=gt

## The Attempt at a Solution

As it forms the angle pi/4 radians, vx=vy, so

v0=gt=3*10=30

vy when t=4 is 40m

v=sqrt(vx^2+vy^2)=50m Am I right