A square postage stamp has area 1280 mm. About how long is each side?
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The projectile's horizontal and vertical positions at time are given by
where . Solve
for the time
it takes for the projectile to reach the ground:
In this time, the projectile will have traveled horizontally a distance of
The projectile's horizontal and vertical velocities are given by
At the time the projectile hits the ground, its velocity vector has horizontal component approx. 176.77 m/s and vertical component approx. -178.43 m/s, which corresponds to a speed of about .