Lesson Plan
Lesson Preview | Objectives
Lesson Preview
Have you ever thought of the hammer the athletes use? It has three parts: a handle, a string wire, and a metal ball. They attach the handle and the ball to the different ends of the wire.
Let's see what happens, when they throw the hammer. The athlete holds the handle, spins around and let the hammer go. To throw the ball far away it needs a large force. This force comes from the athlete. Gravitation makes the ball go towards the ground following the path of an arc. When the ball hits the ground another force comes into the picture. This force (from the ground) stops the ball.
The distance the hammer travels depends on the initial force from the athlete and the highest point of the arc.
Even though you may have never tried this sport, you have certainly experienced the effects of motion and forces.
This lesson will explain:
the definitions of constant speed and average speed
how to solve constant and average speed problems
how to differentiate between speed and velocity
how to develop position-time graphs for moving objects and use them to interpret an object's position or displacement
how to define and recognize force and its relationship to acceleration
how to recognize that unbalanced forces cause acceleration
the meaning of Newton's First Law
how to use Newton's Second Law to solve problems
how to relate Kepler's Laws to the law of universal gravitation
how to use Newton's Third Law to understand interaction pairs
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B. J. Subbiondo © 2005