The athletic event of hammer throw
...gravity takes part in this procedure. Because he/she has to lift the ball, he/she has to use a force to pull the ball up from the ground; this is called the upward force. But there is also another force pulling the ball down, which is gravity that makes it difficult for the lift of the ball. However, in this case, if the athlete grab the ball successfully up from the ground, then there will be an unbalanced force, in which the upward lift force is greater than the gravity, which pulls it down. Secondly, the force of acceleration takes part when the ball is spinning. When the ball was successfully grabbed up from the ground, the athlete then has to increase the speed of the ball and be able to spin it. The athlete uses a force of pulling and starting the speed of the ball. Then the ball has to keep increase its speed, with the athlete using more and more forces and until it reaches the greatest speed. When the ball has spanned to its greatest speed, the ball has to be thrown out from the athlete and onto the outer ground. In this case, the Newton’s First Law occurs on the ball. Newton’s First Law said ¡§A body in motion remains in motion (with constant velocity) unless acted upon by an external force.” When the ball was spanned, it has kept traveling and a constant speed for a while. When it left the athlete’s hands, it then continued to travel at that speed and would not change without any other forces acting against it. Newton’s First Law also occurs on the athlete when the ball is thrown out. Because the athlete has spanned in a great speed, when the ball leaves the athlete’s hand at the greatest speed, the athlete has to stop spinning and either wait to see the position of the ball or just make her/himself look not stupid (Keep spinning). As the athlete was spinning in a great speed, the sudden stop makes the athlete suffering great pain in the head and always intended to trip over the official circle of the triangle . This fits with the Newton’s First Law, which the athlete intended to keep travelling at that speed and when they stop, the feet had stop spinning but the upper half of the body still intended to travel at the same speed and tried to travel in the same direction. Newton’s First Law could easily be observed on the ball when the ball is thrown out and lands. Newton’s First Law fits when the ball is travelling in the air, that the ball has thrown out in a great speed and it is continually travelling at the same speed unless acted upon air resistance and gravity, which tends to slow it down and pulls it onto the ground. Newton’s Thi...