BIO The Flying Leap of a Flea. High-speed motion pictures (3500 frames/second) of a jumping 210- μ g flea yielded the data to plot the flea’s acceleration as a function of time, as shown in Fig. P5.78. (See “The Flying Leap of the Flea,” by M. Rothschild et al., Scientific American, November 1973.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Using the graph, (a) find the initial net external force on the flea. How does it compare to the flea’s weight? (b) Find the maximum net external force on this jumping flea. When does this maximum force occur? (c) Use the graph to find the flea’s maximum speed.
BIO The Flying Leap of a Flea. High-speed motion pictures (3500 frames/second) of a jumping 210- μ g flea yielded the data to plot the flea’s acceleration as a function of time, as shown in Fig. P5.78. (See “The Flying Leap of the Flea,” by M. Rothschild et al., Scientific American, November 1973.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Using the graph, (a) find the initial net external force on the flea. How does it compare to the flea’s weight? (b) Find the maximum net external force on this jumping flea. When does this maximum force occur? (c) Use the graph to find the flea’s maximum speed.
BIO The Flying Leap of a Flea. High-speed motion pictures (3500 frames/second) of a jumping 210-μg flea yielded the data to plot the flea’s acceleration as a function of time, as shown in Fig. P5.78. (See “The Flying Leap of the Flea,” by M. Rothschild et al., Scientific American, November 1973.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Using the graph, (a) find the initial net external force on the flea. How does it compare to the flea’s weight? (b) Find the maximum net external force on this jumping flea. When does this maximum force occur? (c) Use the graph to find the flea’s maximum speed.
High-speed motion pictures (3500 frames/second) of a
jumping 230 μg flea yielded the data to plot the flea's
acceleration as a function of time as shown in the figure (
Figure 1). (See "The Flying Leap of the Flea," by M.
Rothschild et al. in the November 1973 Scientific
American.) This flea was about 2 mm long and jumped at
a nearly vertical takeoff angle. Use the measurements
shown on the graph to answer the questions.
Figure
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Part E
Use the graph to find the flea's maximum speed.
Express your answer in meters per second to two significant figures.
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A woman driving a car 16 ft long is passing a truck 28 ft long. The truck is traveling at 50 mi/h. How fast must the woman drive her car so that she can pass the truck completely in 6 s, from the position shown in figure (a) to the position
shown in figure (b)? [Hint: Use feet and seconds instead of miles and hours.]
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by 6 mi/h to drive the 132 mi from Barrington to Collins. If the second leg of his trip took 2 min more time than the first leg,
A prankster flips a coin off of the Empire Building at a height of 1054 feet above the ground. The initial vertical velocity of the coin is 1.20m/s. In real life, air resistance would limit the maximum speed the coin can attain during its fall, but if air resistance were not a factor and assuming it has practically no horizontal motion, answer the following questions. (1 foot = 0.3048m)
a. What would the coin's velocity be when it hits the ground?
b. How long would it take to hit?
c. How high would the coin be halfway through the total falling time, and how fast would it be falling then?
Chapter 5 Solutions
University Physics with Modern Physics (14th Edition)
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