A ball is thrown vertically upward with a speed of 17.0 m/s. (a) How high does it rise?
(b) How long does it take to reach its highest point?
(c) How long does it take to hit the ground after it reaches its highest point?
(d) What is its speed when it returns to the level from which it started?

Ok i am attempting to my niece attach a galvanized wire (like a tether for a dog) at the corner of two fences, making a tightwire if you will and we drilled a hole in a softball and she hits it. the ? and problem is that we can not get the wire taunt enough where it doesnt sag after hitting the ball once, and the wire sags and wobbbles. its a 15 ft rubber covered galvanized wire and one can adjust the length of the placing of the wire by having it make the corner of 2 fences become a it can be adjusted, however, with all our human strength and pliers we could not make it taunt as possible. is there anything other that attaching it to a car to do this. sorry abt the length but it would mean the world to my niece if i could solve this came up with the entire idea herself, and she is 14 and paid for the wire and did as much work as i did drilling a hole through a softball wide enough for attaching piece at each end of the wire that clips on to the fence. . any ideas welcome if serious. but awesome if it is a fact. much obliged. bucky bukowski buckman

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e