# Versus time being sure to show all three time

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versus time, being sure to show all three time intervals. (b) What is its velocity after the 3.0 s of braking? (c)What was its displacement during the total 14.0 s of its motion? (d) What was its average speed for the 14.0s?
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Full file at 53.A train normally travels at a uniform speed of72 km hon a long stretch of straight, level track. On aparticular day, the train must make a 2.0-min stop at a station along this track. If the train decelerates at auniform rate of21.0 m sand, after the stop, accelerates at a rate of20.50 m s ,how much time is lost
54.MCFor a constant linear acceleration, the velocity-versus-time graph is (a) a horizontal line, (b) a verticalline, (c) a nonhorizontal and nonvertical straight line, (d) a curved line.
55.MCFor a constant linear acceleration, the position-versus-time graph would be (a) a horizontal line, (b) avertical line, (c) a nonhorizontal and nonvertical straight line, (d) a curve.
56.MCAn object accelerates uniformly from rest fortseconds. The object’s average speed for this time intervalis (a)2,at(b)1
57.CQIf an object’s velocity-versus-time graph is a horizontal line, what can you say about the object’s
58.CQIn solving a kinematic equation forx, which has a negative acceleration, isxnot
59.CQ
60.CQA classmate states that a negative acceleration always means that a moving object is decelerating. Is thisv
61.At a sports-car rally, a car starting from rest accelerates uniformly at a rate of29.0 m sover a straight-linedistance of 100 m. The time to beat in this event is 4.5 s. Does the driver do it? If not, what must the
62.A car accelerates from rest at a constant rate of22.0 m sfor 5.0 s. (a) What is the speed of the car at theend of that time? (b) How far does the car travel in this time?
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Full file at 63.A car traveling at25 mi his to stop on a 35-m-long shoulder of the road. (a) What is the requiredmagnitude of the minimum acceleration? (b) How much time will elapse during this minimum decelerationuntil the car stops?

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Term
Spring
Professor
jokal
Tags
Velocity, Car