Physics
posted by Brian .
A cannon is mounted on a truck that moves forward at a speed of 5 m/s. The operator wants to launch a ball from a cannon so the ball goes as far as possible before hitting the level surface. The muzzle velocity of the cannon is 50 m/s. What angle from the horizontal should the operator point the cannon?

A ball is dropped from rest from 10 m above ground. The speed of the ball in the middle of trip to ground is close to
Answer
14 m/s
10 m/s
can't be determined because mass is not given
100 m/s