A 55 kg pole-vaulter reaches a speed of 11 m/s just before planting the pole for the vault. a. If he has a speed of 0.5 m/s when he crosses the bar, what height can he clear?
b. If the mats he lands on are piled 1.5 m high, at what speed does he hit the mats?

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.