B. Essay. Write your answers in less than 100 words.5. When is distance the same as displacement?6. Differentiate speed from velocity.7. Which of the three graphs below show constant velocity and constant acceleration? Explain.dt8. Why is it important to assume that the air resistance is zero when you are calculating thevelocity of a freely falling object?C. Problem solving. Show your solutions step-by-step.9. Two cars are travelling at 50 km/hr but are 20 meters apart. Car A, which is ahead of Car B,decelerates and fully stops 10 seconds after application of the brakes. The driver of Car Bsees the red brake lights of Car A so he also decelerates to full stop 5 meters behind Car A.What is the deceleration of Car B?10. A free-falling ball is dropped from a height of 12 meters. What will be its final velocity justbefore it hits the ground? IV. EvaluationA. Re-express the following descriptions of objects uniformly accelerating in one dimension in terms ofmathematical variables.1. A car is accelerating at 10 meters per second squared.2. The initial velocity of an airplane at takeoff is 300 kilometers per hour. It climbs to 400kilometers per hour in 60 seconds.3. You want to determine the final velocity of runner who has an initial velocity of 8 meters persecond. She is also accelerating at 2 meters per second squared.4. You want to determine the acceleration of a bird flying initially at 20 meters per second andthen at 40 meters per second. The bird travelled 15 meters from t = 0 seconds.

Answered: A. Re-express the following…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter1: Introduction: The Nature Of Science And Physics

Section: Chapter Questions

Problem 1PE: The speed limit on some interstate highways is roughly 100 km/h. (a) What is this in meters per...

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1. If you walk 500 m due North and then 200 m due South,a. What is your total distance covered?b. What is your displacement? 2. A spacecraft traveling at 1200 m/s is uniformly accelerated at the rate of 150 m/s2 by burning itssecond stage rocket. If the rocket burns for 18 seconds, what is the final speed of the craft?
2. A motorist saw a humps 33 m away at a speed of 14.5 m/s. He immediately slams on the brake and decelerates 1.2 m/s 2 with a speed of 11.7 m/s. (a) Will he stop before the humps (express your answer in magnitude)? (b) How long it will take before stopping?
A spaceship ferrying workers to Moon Base I takes a straight-line path from the earth to the moon, a distance of 384,000 km. Suppose it accelerates at 20.0 m/s2 for the first 15.0 min. of the trip, then travels at constant speed until the last 15.0 min. when it accelerates at –20 m/s2, just coming to rest as it reaches the moon. (a) What is the maximum speed attained? (b) What fraction of the total distance is traveled at constant speed? (c) What total time is required for the trip?
An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s2. It travels a distance of 1.033 km while accelerating. (a) How fast is the auto moving just as it is traveled the 1.033 km? Explain (b) How many seconds did it take to travel the 1.033 km?
1) A bird has flown 300 bm for 6 hours, What is the bird's speed? INOTE: use m/hr as the correct label) oo
A policeman is standing on the side of the road eating donuts when a politician who stole public funds drives past him at a constant speed of 120m/s. After 3s, the policeman decided to get inside his vehicle and go after the politician. If the police vehicle accelerates uniformly at 40m/s^2 (a) How long does it take him to catch the politician and congratulate him? (b) How far has he traveled in that time? (Assume the politician remained in motion at constant speed)
1. A pilot in a small plane encounters shifting winds. He flies 26.0 kmkm northeast, then 45.0 kmkm due north. From this point, he flies an additional distance in an unknown direction, only to find himself at a small airstrip that his map shows to be 70.0 kmkm directly north of his starting point. What was the length of the third leg of his trip? What was the direction of the third leg of his trip? 2. A boat can travel 7.3 m/s in still water. It is crossing a 220 m wide river while pointed due east and the river is flowing at 3.7 m/s, north. What is the speed of the boat, relative to the shore? How long does it take to cross the river? How far downstream does the boat end up? 3. A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 14 m/sm/s . A wise elder duck finally realizes that the solution is to fly at an angle to the wind. If the ducks can fly at 15 m/sm/s relative to the…
10) The speed limit on some interstate highways is roughly 120 km/h. a) What is that speed in meters per second? b) How many miles per hour is this?
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1. The 5,000kg final stage of a spaceship ejects the 10,000kg second stage. Before ejection, the two stages together travel with a velocity of 200m/s. If after ejection the second stage travels at 50m/s opposite the direction of its initial motion, what is the velocity of the final stage?
A fictional spaceship accelerates at a constant rate of 0.102 m/s2. (a) How long would it take to reach the moon, 3.63 108 m away?(b) What would be its final velocity?
1. While on vacation, Lisa Carr traveled a total distance of 440 miles. Her trip took 8 hours. What was her average speed?2. What is the distance and the displacement of the race car drivers in the Indy 500?3. What is the displacement of the cross-country team if they begin at the school, run 10 miles and finish back at the school?4. A car accelerates from rest to a speed of 36 km/h in 20 seconds. What is the acceleration of the car in m/s2?5. A car slows down from a speed of 72 km/h to rest in 25 seconds. What is the acceleration of the car?

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