Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 2, Problem 23P
(a)
To determine
The graph that best describes the velocity of the car as it accelerates.
(b)
To determine
The position-time graph of the car showing the position of car at each of the
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There is a 250-m-high cliff at Half Dome in
Yosemite National Park in California. Suppose a
boulder breaks loose from the top of this cliff.
(a) How fast will it be going when it strikes the
ground? (b) Assuming a reaction time of 0.300
s, how long a time will a tourist at the bottom
have to get out of the way after hearing the
sound of the rock breaking loose (neglecting the
height of the tourist, which would become
negligible anyway if hit)? The speed of sound is
335.0 m/s on this day.
(a) Starting at the position x = 0, you walk in the +x-direction for 6 seconds at a constant speed, then stop for 2 seconds, then turn around and walk back toward the origin at a constant speed for 2 seconds, coming to a stop at a position x = 1 m and waiting there
for a second. Assume that t= 0 is the initial time.
Which of the following best represents the graph of your x-position vs. time t for your motion?
n
Which of the following best represents the graph of your velocity v, vs. time t for your motion?
Vx
V₂
OO
V₂
H
00
V₂
Ⓡ
You are driving a car along a straight road at 122 kph. Suddenly, you saw a cat crossing the road and you apply the brakes decelerating the car at a constant rate of -44 ft/s. If your reaction time is 1.50 seconds, what is the shortest stopping distance from the moment you see the cat? Illustrate the problem.
Chapter 2 Solutions
Physics for Scientists and Engineers
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- There is a 250-m-high cliff at Half Dome in Yosemite National Park in California. Suppose a boulder breaks loose from the top of this cliff. (a) How fast will it be going when it strikes the ground? (b) Assuming a reaction time of 0.300 s, how long will a tourist at the bottom have to get out of the way after hearing the sound of the rock breaking loose (neglecting the height of the tourist, which would become negligible anyway if hit)? The speed of sound is 335 m/s on this day.arrow_forwardYou travel from point A to point B in a car moving at a constant speed of 70km/h. Then you travel the same distance from point B to another point C, moving at a constant speed of 90km/h. Is your average speed for theentire trip from A to C equal to 80km/h. Explain why or why not.arrow_forwardComplete solution and answer must be simplified. A particle is moving on a straight line has acceleration a=5-3t and it's velocity is 8 at time=2. If s(t) is the distance from the origin, find s(2) -s(1). Note : s (t) = f v dt v (t) = f a dtarrow_forward
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- A car travels along the North Luzon Expressway with a constant speed of 45 kph. To avoid getting penalized of under-speeding, it accelerates at 8 m/s2. Determine the time, in s, that it takes to reach the minimum speed limit of 80 kph. Also determine the distance travelled by the car while accelerating .If it stops to pay at a tollgate, determine the deceleration, in m/s2, of the car in 10 s. Also determine the distance travelled by the car while deceleratingarrow_forwardExample 2-17 depicts the following scenario with the accompanying figures. A speeder doing 40.0 mi/h (about 17.9 m/s) in a 25 mi/h zone approaches a parked police car. The instant the speeder passes the police car, the police begin their pursuit. The speeder maintains a constant velocity, and the police car accelerates with a constant acceleration of 3.3 m/s². Now we will consider some slightly different related scenarios to Example 2-17. ▼ Part A dmax Submit = Part B ΠΑΞΙΑΣΦΑ AΣO X Incorrect; Try Again; 4 attempts remaining a= Previous Answers Request Answer ? • [ ? = 17.9 m/s Suppose the speeder (red car) is traveling with a constant speed of 17 m/s. If the police car is to start from rest and catch the speeder in 13 s or less, what is the maximum head-start distance the speeder can have? Measure time from the moment the police car starts. Express your answer using one significant figure. m 5-0 PONICE a=0 1=4.51 m/s² ( 175 150 125 100 75 50 25 Speeder, Police car, Xp Time, t(s) 8…arrow_forwardA train on a very long straight level stretch of tracks, starting from a dead stop, steadily speeds up to 28 m/s (about 63 mph) in 14 minutes, and then slows to 18 m/s (about 40 mph) with a constant deceleration of magnitude 0.011 m/s 2. What was the average speed of the train for this whole thing (speeding up and slowing down)? Hint: in this problem, if you take the direc- tion the train is going as positive, then average speed is the same thing as average velocity.arrow_forward
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