Results If ski wax can be applied by rubbing‚ pasting‚ spraying‚ or melting then the melt on wax should reduce friction the best because it coats the skis more evenly and creates a thicker protective barrier to the bases of the skis. Consequently‚ this hypothesis was correct because the data captured displayed that the hot wax reduces friction the best‚ see appendix seven‚ eight‚ and nine. Hot melt on wax had the fastest time when the ice disc was slid down the ski and had the highest velocity. It
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EXERCISE 1 1. Write the following as full (decimal) numbers in SI units: (a) 286.6 mm‚ (b)85 V (c) 760 mg‚ (d) 60.0 ps‚ (e) 22.5 fm‚ (f) 2.50 GV. 2. A typical adult human lung contains about 300 million tiny cavities called alveoli. Assume that the alveoli are spherical‚ and that the volume of a typical human lung is about 2 liters‚ estimate the average diameter of a single alveolus. 3. Two vectors have length and What are the maximum and minimum magnitudes of their vector sum? 4. is a vector
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fall before landing on the ground with a parachute. As the skydiver falls‚ he or she encounters the force of air resistance. The amount of air resistance is dependent on two variables‚ speed and cross-sectional area. The speed of the skydiver accelerates downwards and gains speed with each second. The increase in speed is accompanied by an increase in air resistance. This force of air resistance counters the force of gravity. Once the force of air resistance is as large as the force of gravity‚ a balance
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horizontally at a speed of from the edge of a cliff in height. How far from the base of the cliff will the stone strike the ground? 2. A toy truck moves off the edge of a table that is high and lands from the base of the table. a. How much time passed between the moment the car left the table and the moment it hit the floor? b. What was the horizontal velocity of the car when it hit the ground? 3. A hawk in level flight above the ground drops the fish it caught. If the hawk’s horizontal speed is ‚ how
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Practice Projectiles (Source for the first five problems WWW.MIAMI-BEST-MATH-TUTOR.COM‚ 1. 1. A physics book slides off a horizontal table top with a speed of 1.10 m/s. It strikes the floor in 0.350 s. Ignore air resistance. Find the height of the table top above the floor; the horizontal distance from the edge of the table to the point where the book strikes the floor; the horizontal and vertical components of the book’s velocity‚ and the magnitude and direction of its velocity‚ just before
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The blue vector is accelerating toward the center. The green vector is perpendicular due to being tangent along the path of the circle. 4) Now move the ball at a slow constant speed across the screen. What do you notice now about the vectors? Explain why this happens. The vectors are not noticeable. The speed remains constant therefore there would not be acceleration. Velocity
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AP Physics HW #1 Multiple Choice 1. A car travels 30 miles at an average speed of 60 miles per hour and then 30 miles at an average speed of 30 miles per hour. The average speed the car over the 60 miles is (A) 35 m.p.h. (B) 40 m.p.h. (C) 45 m.p.h. (D) 10 m.p.h. (E) 53 m.p.h. Answer: B. Method: Vavg = Δx/Δt The average speed is the total distance traveled‚ divided by the total time. They give us all distances traveled is‚ so we just need to find the time. We find the time‚ by applying
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seconds. How many more seconds will he take to pass the remaining 4 flags ? 2. A person has to cover the fixed distance through his horses. There are five horses in the cart. They ran at the full potential for the 24 hours continuously at constant speed and then two of the horses ran away to some other direction. So he reached the destination 48 hours behind the schedule. If the five horses would have run 50 miles more‚ then the person would have been only 24 hours late. Find the distance of the destination
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SAMPLE PROBLEMS: 111-SET #1 VECTOR ADDITION‚ SUBTRACTION 01-1 1). A man is able to row a boat at 3 mph in still water. If he rows his boat pointed straight across a river with a current of 4 mph‚ what is his net velocity? If the river is 0.5 miles wide‚ at what point will he land on the other side? Solution: The first step in problem solving is to identify the problem type. In this problem we are asked for a ‘net velocity.’ Since velocities behave as vectors‚ then we have a vector addition
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Name:David B. Victorioso Year/section:IV-Acacia Date:Saeptember 16‚2013 Teacher:Mrs.Noceda Age Problem Problem 1 An eagle is 4 times as old as a falcon. Three years ago‚ the eagle was 7 times as old as the falcon. Find the present age of each bird. Solution x = falcon’s age now 4x = eagle’s age now {the eagle is 4 times as old as falcon} x - 3 = falcon’s age 3 years ago 4x - 3 = eagle’s age 3 years ago 4x – 3 = 7(x – 3) {three years ago‚ eagle
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