*112. The highest speed attained by a cyclist on level ground is 105 km/h. To attain...
The highest speed attained by a cyclist on level ground is 105 km/h.To attain this speed,the cyclist used a streamlined recumbent bike.Starting from rest,he gradually built up his speed by pedaling furiously over a distance of 3.2 km.If his acceleration was uniform over this distance,what was the acceleration and how long did the cyclist take to build up his final speed?
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...