here's 3 problems i need to solve.. but i got all of them wrong and I don't understand why.. I believe i had the right formula/procedure. can someone show me how to do it? thanks
1. A football is thrown directly toward a receiver with an initial speed of 15.0 m/s at an angle of 23° above the horizontal. At that instant, the receiver is 18 m from the quarterback. In what direction and with what constant speed should the receiver run to catch the football at the level at which it was thrown?
2. A rocket is launched at an angle of = 45° above the horizontal with an initial speed vi = 57 m/s, as shown below. It moves for 25 s along its initial line of motion wth an acceleration of 22.2 m/s2. At this time, its engines fail and the rocket proceeds to move as a free body.
(a) What is the rocket's maximum altitude?
(b) What is the rocket's total time of flight?
(c) What is the rocket's horizontal range?
3. A science student riding on a flatcar of a train moving at a constant speed of 12.8 m/s throws a ball toward the caboose along a path that the student judges as making an initial angle of 65° to the horizontal. The teacher, who is standing on the ground nearby, observes the ball rising vertically. How high does the ball rise?
thanks so much for the help!!