Physics

PHYSICS
Chapter 3 lesson 3
Practice problems: p74: 42, 44, And 46.
42.a. -39 m/s when the upward teaching is affirmative.
b. The brick falls 78m.
44. 8.3 m/s.
46.a. 2.2 m/s
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b. 0.45 s
Chapter 3 assessment
Questions: 56, 58, 60, 71, 72, 73, 78, 82, 89, 91, 93, 96, 100
56. The gondola car starts from fill-in and increases its cannonball along. As the cars speed increases, the driver open frames hucksters.
58. Yes, a cars velocity is positive or negative with respect to its instruction of relocation from close to point of reference. One direction of motion is defined as positive, and velocities in that direction are considered positive. The opposite direction of motion is considered negative: all velocities in that direction are negative. An aim undergoing positive acceleration is either increasing its velocity in the positive direction or reducing its velocity in the negative direction. A cars velocity can change signs when experiencing unvarying acceleration. For example, it can be traveling right, while the acceleration is to the left. The car slows down, stops, and thusly starts accelerating to the left.
60. When the velocity clock graph is a wrinkle parallel to the t-axis, the acceleration is zero.
71.



Velocity increases rapidly at first, then more slowly. Acceleration is greatest at the beginning plainly is reduced as velocity increases. Eventually, it is necessary for the driver to shift into the second gear. The acceleration is smaller just before the gear change because the hawk is less at that point on the graph. Once the driver shifts and the gear engage acceleration and the slope of the curve increases.
72. The acceleration is the largest during an interval starting at t=0 and lasting about 1/2 s. it is the smallest beyond 33s.
73. He walks in the positive direction at a constant speed. Then he walks in the positive direction at an increasing speed for a short time: he keeps walking at a moderate speed for twice that amount...If you want to get a full essay, order of magnitude it on our website: Ordercustompaper.com



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