5. Projectile Motion

Jim pushes a penny off a $0.86\mathrm{m}$ tall table. Assume the penny is moving horizontally as it leaves the table at 5 m/s. How long is the penny in the air? Ignore air resistance.

Bob throws a ball from his second story window to his friend Steve who is on the ground below. Assume that Bob throws the ball horizontally at $10\mathrm{m}/\mathrm{s}$, and Steve will catch the ball at a point $4.5\mathrm{m}$ below Bob. How far from the base of the building should Steve stand in order to catch the ball?