Aprojectile is fired with muzzle speed 250 m/s and an angle of elevation 45° from a position 30 m above ground level. where does the projectile hit the ground and with what speed?

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 .

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150

answer: it's d

step-by-step explanation: