By Robert Gardner
What is friction? what's the coriolis strength? younger scientists will discover the physics of forces and movement with the nice experiments during this ebook. Full-color illustrations spotlight key issues to make technology a snap! Many experiments are via principles for technological know-how reasonable initiatives. aid scholars ace their subsequent physics undertaking or try out!
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Extra resources for Ace Your Forces and Motion Science Project
To build a cork accelerometer, tie a piece of thread to the head of a straight pin (see Figure 12). Stick the pin into a small cork or a piece of Styrofoam. Tape the free end of the thread to the center of the screw-on cap of a clear glass or plastic jar. Fill the jar completely with water, screw on the cap, and invert the jar. Presto! You have an accelerometer. Place an accelerometer on a countertop and move it gently back and forth. Watch what happens when you start or stop moving the accelerometer.
Then, in your notebook, make drawings of both sides of the soda straws shown in Figure 7d. FIGURE 7: a) A pin is placed across two identical supports. b) In which pin position does the straw balance easiest? c) Hang a paper clip at one end of the straw. Where can you hang a second paper clip to make the straw balance? d) Where are the two paper clips on the other side of these balanced straws? e) Where is the one paper clip on the other side of these balanced straws? f) Where are the two paper clips on the other side of these balanced straws?
Remove the heavier ball and set it aside. Place the other bowling ball back in the gutter as before. Set the lightest ball on the mark on the plank. Release it. What happens to both balls? How do you explain the results? When the heavier ball hits the ball in the gutter, the heavier ball slows down but keeps rolling. At the same time, the ball in the gutter (lighter ball) moves rapidly away. To explain this, consider that the third law says that each ball will exert an equal but opposite force on the other one.