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The 1992 wold speed record for a bicycle (human powered vehicle)was set by Chris Huber. His time through the measured 200 m stretchwas was a sizzling 6.509 s, at which he commented, "Cogito ergozoom!" (I think, therefore I go fast!). In 2001, Sam Whittinghambeat Huber's record by 19.0 km/h. What was Whittingham's timethrough the 200 m?
The wheel of a car has a radius of 20cm. It initially rotates at 120rpm. In the next minute it makes 90 revolutions. How much farther does the car travel before coming to rest
The mass of the moon is 7.34 x 10^22 kg and its average radius is 1785 km. What was the period of the Lunar Prospector
Two rockets, A and B, approach the earth from opposite directions at speed 0.60c. What is the length of rocket A as measured by the crew of rocket B
A ball of mass 5.8 kg and radius 13 cm rolls without slipping horizontally at 5.6 m/s and hits a spring attached to a wall. What is the maximum change in length of the spring
A certain type of laser emits light that has a frequency of 5.2 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse.
During a drive by golfer Tiger Woods, the angular velocity of his club is zero at the top of the backswing and the 1719 degree/second at the bottom of the downswing just before impact with the ball
Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. What is the resistivity of the leaf tissue
In a women's 100-m race, accelerating uniformly, Laura takes 1.87 s and Healan 3.12 s to attain their maximum speeds, which they each maintain for the rest of the race.
A gymnast with mass m1 = 43.0 kg is on a balance beam that sits on (but is not attached to) two supports. What is the force the left support exerts on the beam
A driver in a car travelling at a speed of 58.0 mi/h sees a deer 126 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assume that the deer does not move in the meantime).
A train started from rest and moved with constant acceleration. Atone time it was traveling at 54.0 m/s. Calculate (a) the acceleration, (b) the time requited to travel at 160 m, (c) thetime required to attain the speed of 33.0 m/s and (d) the di..
At what speed does the speed of the ball change relative to the cab floor (sign and magnitude)?
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