Experiment 4-Motion Experiment Lab Data Page (11

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Experiment 4-Motion Experiment Lab Data Page (11.5 pts total) Name: Section: Part A-Dropping Things 1. Record your observations in dropping two balls at a time. Put the name of the ball that hit the ground first or the word ”same”. (0.5 pts) Styrofoam Ball Steel Ball Plastic Ball Wood Ball Styrofoam Ball Steel Ball steel Plastic Ball plastic steel Wood Ball wood wood wood 2. Does the crumpled paper and the flat paper hit the ground at the same time? Why? (0.5 pts) No because the flat paper has more surface area that collides with air resistance as opposed to the crumbled paper. 3. Does the paper by itself fall as fast as the book? Why? (0.5 pts) No, the paper does not fall as fast as the book because the mass of the book is heavier and more resistant to the air while the paper is less resistant to the air. 4. What happened when the paper was placed on top of the book? Why? (0.5 pts) When the paper was placed on top of the book, it falls and the same time as the book because the book blocks any air resistance that would effect the paper if it fell by itself. 5. Do the two nested coffee filters hit the ground at the same time as the single coffee filter? Why? (0.5 pts) No, the nested coffee filters hit the ground faster than the single coffee filter because the nested coffee filter has less air resistance than the flat single coffee filter.

Conclusion to Part A: (1 pt) Air resistance affects the speed that an object will reach the ground. When there is more air resistance, the object takes longer to fall. And when there is less air resistance, it falls faster. Part B-Bubble in a Bottle 1. Which direction did bubble move when the bottle starts to move to the right? Why ? (1 pt) The bubble moves towards the back of the bottle because the water wants to stay behind. This is inertia. Bubble will go back to its original spot, and it gets accustomed to the new inertia movement. 2. Which direction did the bubble move when the bottle slows down or stops? Why ? (1 pt) The bubble goes back when the bottle stops because the water will take the same movement as before due to inertia. Conclusion to Part B (State Newton’s First Law of Motion in detail) : (0.5 pts) Newtons first law of motion is Mass and Inertia states that an object at rest and an object in motion stays in motion or at rest until an unbalanced force act upon it. Part C-Gyroscopes 1. Describe what happened when you tried to move the bicycle wheel gyroscope when holding onto the handles with each hand? (0.5 pts) When trying to move the bicycle wheel gyroscope when holding onto the handles with each hand, the gyroscope continues spinning in the same direction and tries to resist movement. 2. What direction did the spinning bicycle wheel gyroscope precess when you spin it clockwise ? (0.5 pts) The direction the wheels move when it is spinning clockwise is anticlockwise. 3. What happened to the direction of precession when the bicycle wheel gyroscope was spun anticlockwise ? (0.5 pts) When the gyroscope was spun anticlockwise, the direction of precession was clockwise.

4. What happened to the spinning toy or small gyroscope when on the tabletop or on the pedestal? (0.5 pts) When the toy gyroscope is on the tabletop, it is balanced and spins in place. 5. What happened when you pressed down on the spinning small spinning gyroscope? (0.5 pts) When the toy gyroscope is pushed down, it resists change. 6. Hold the top axle with one hand and the bottom with the other hand so that the gyroscope is in a vertical position. Now turn the gyroscope horizontal. What did you feel? (0.5 pts) When the gyroscope is moved from vertical to horizontal, there is no change and it continues to spin in the same direction 7. What happened when you tried to change the direction of the toy Segway prototype? -SKIP- Conclusion to Part C: (1 pt) Gyroscopes move with an interplay of vector forces; it shows that objects in motion will keep momentum in the same direction of the original force applied. Part D-Flick Experiment 1. Which coin hits the ground first? Is this what you expected? Why did this happen (what’s the science behind it) ? (0.5 pt) Both coins fell at the same time and yes, this is what I expected. This happens because the acceleration of gravity is the same for both coins. As well as its speed and air resistance, therefore the coins will reach the ground at the same time. Conclusion to Part D: (1 pt) Hint: Your answer here should be similar (different wording) to your answer above and must include the formula(s) related to objects that fall from a certain height. When objects with similar mass are horizontally and vertically by a common force, they will reach the ground at the same time because the speed and air resistance cause both coins to fall and land at the same time. v=g.t h=g.t^2/2

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