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A 70-kg bicyclist coasts down a hill that makes a 10degree angle with the horizontal at a speed of 10 m/s.
(a) If the drag force is given by Fdrag = -bv, what is the drag coefficient b?
(b) If when peddling the bicyclist can generate 0.50 hp, how fast can he go up the hill?
If an object is moving with constant momentum ‹ 12, ?16, ?7 › kg · m/s, what is the rate of change of momentum
A 5.0 multiplied by 102-newton girl takes 10. seconds to run up two flights of stairs to the landing, a total of 5.0 meters vertically above her starting point. What power does the girl develop during her run.
Consider the central peak in the diffraction envelope in the figure below. Suppose the wavelength of the light is changed to 450 nm. What happens to this central peak?
A basketball player jumps straigh up to launch a long jump shot at an angle of 45 degrees with the horizontal and a speed of 15 m/s. How far from his original position does he land
Time intervals measured with stopwatch typically have anuncertainty of about 0.2s, What is the percent of a hand timed measurement of a. 5.0s b.50s c 5min
A small galvanometer coil of resistance R = 20 ? and full-scale deflection at 1 mA is connected in series with a 4980 ? resistance to build an analog voltmeter
A baseball is seen to pass upward by a window 28m above the street with a vertical speed of 13 m/s. find the max height assuming the ball was thrown from the street
The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature
The trajectory of a singly ionized helium atom for two full revolutions around the z-axis but using a singly ionized argon atominstead.
a calculate the limiting visual brightness in magnitudes for naked eye viewing through a 10-m telescope. assume the eye
A shopper in a supermarket pushes a cart with a force of 37 N directed at an angle of 25° below the horizontal. What is the net work done on the cart
we drive a distance of 1 km at 16 kmh. then we drive an additional distance of 1 km at 32 kmh. what is our average
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