The ball can be considered a closed system.
On our Earth, throwing a ball physically upwards brings the saying that, "What goes up, must come down."
Any object near the surface of the earth and not constrained experiences a downward vertical acceleration of 9.8 meters (32.2 feet) per second2 because of the mutual force of gravitational attraction between it and the earth.
When you hit a ball off a tee or hit one that's pitched to you, you are changing its momentum. In the first case, the ball has zero momentum before you hit and only a little more when you nip it and it dribbles a few away from you while everyone watching laughs. In the latter case, the thrown ball has positive momentum that the pitcher gave it, and hitting it changes that momentum from positive to negative, assuming you don't foul it straight back. (Momentum is a vector quantity, you see.) Changing an object's momentum requires you to do work on it, which requires energy. The greater the change in momentum, the more energy is required. But momentum depends upon mass as well as velocity. In other words, if two objects are going the same speed, the more massive object has greater momentum, which is why it's better to get hit in the head with a ping-pong ball dropped from three feet than a bowling ball dropped from three inches. So, a more massive -- that is, heavier -- ball will not go as far if you hit it with the same amount of energy with which you hit a lighter one.
In thermodynamics, work done by a system on its surroundings or another system is said to be positive.
... is said to be constant.
Note that tornadic winds do not just go up; they sprial upward. So the damage is not purely a result of the upward movement. That said, the vertical component of dornadic winds makes them more damaging then simple-horizontal winds. The rapid upward movement of air makes it more likely for roofs to torn from structures. In somce cases whole barns, trailers, and event houses may be lifted.
On the bullet itself, gravity and air friction.
He is out for interfering with a thrown ball while running out of the baseline. The same is true with a runner running to first base. Tom Seaver said that when he saw a runner running to first in fair territory he would throw the ball into his back to get the quick out.
Any object near the surface of the earth and not constrained experiences a downward vertical acceleration of 9.8 meters (32.2 feet) per second2 because of the mutual force of gravitational attraction between it and the earth.
When the force of gravity equals upthrust, the object is stationery and the forces are said to be equal. Eg. A scuba diver holding position underwater. A soccer ball will remain stationery when the force of gravity is equal to the upward force on the ball.
You can't tackle a player that doesn't have the ball in his possession. You can block any player you want -- you can even knock someone over with a pancake block -- but grabbing onto a player who doesn't have the ball and taking him to the ground would constitute holding.
See the ball hit the ball
Chris might they even said it
It said that a softball is harder to hit because of the force it comes in at is greater in the highest levels of softball then is baseball, also the underhand motion causes the ball to have an upward movement which is hard to master then the downward movement of a baseball.
When you hit a ball off a tee or hit one that's pitched to you, you are changing its momentum. In the first case, the ball has zero momentum before you hit and only a little more when you nip it and it dribbles a few away from you while everyone watching laughs. In the latter case, the thrown ball has positive momentum that the pitcher gave it, and hitting it changes that momentum from positive to negative, assuming you don't foul it straight back. (Momentum is a vector quantity, you see.) Changing an object's momentum requires you to do work on it, which requires energy. The greater the change in momentum, the more energy is required. But momentum depends upon mass as well as velocity. In other words, if two objects are going the same speed, the more massive object has greater momentum, which is why it's better to get hit in the head with a ping-pong ball dropped from three feet than a bowling ball dropped from three inches. So, a more massive -- that is, heavier -- ball will not go as far if you hit it with the same amount of energy with which you hit a lighter one.
a bowling ball
When the boy is holding the ball it has Gravitational Potential Energy (GPE).When he lets go the Gravitational Potential Energy is converted to Kinetic Energy.As the ball is falling it continues to gain Kinetic Energy, however, the friction from the air on the ball increases (Air Resistance).When the Kinetic Energy and Air Resistance become equal the ball is said to have to reached Terminal Velocity.Once the ball hits the ground the Kinetic Energy is transferred to the ground through heat (Friction) and also as sound.Remember energy cannot be created or destroyed, it is always transferred.
by hitting the said thrown grenade with a grenade to thrust it back at said owner (must be stick or will bounce every were)