COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 2, Problem 42QAP
To determine
Time taken by the car to catch up with the truck
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2. Is it possible for an object to be zero speed when its acceleration is not zero? Explain
with an example.
Q1) While a car is moving with a speed 108 m on a straight road the driver sees a truck which enters the road 75m
ahead. The driver applies full brake 0.5s after s/he observes the truck, however the car hits the truck with a speed of
50m. Then what would be the maximum initial speed of car in when the driver observes the truck in order that
the car does not hit the truck with all other conditions are the same?
University Physics 1 - Kinematics;
Can an object have a velocity with zero acceleration? Can an object have acceleration with zero velocity? Explain why or why not.
Chapter 2 Solutions
COLLEGE PHYSICS
Ch. 2 - Prob. 1QAPCh. 2 - Prob. 2QAPCh. 2 - Prob. 3QAPCh. 2 - Prob. 4QAPCh. 2 - Prob. 5QAPCh. 2 - Prob. 6QAPCh. 2 - Prob. 7QAPCh. 2 - Prob. 8QAPCh. 2 - Prob. 9QAPCh. 2 - Prob. 10QAP
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- If the velocity of an object is nonzero, can its acceleration be zero?Give an example if your answer is yes; explain why not if your answer is no.arrow_forward= 4.5 km 1-5 km Avera (a) Average velocity = 2-25 km/h (40/60) h 4.5 km (b) Average speed = = 6-75 km/h %3D (40/60) h Example 6 On a 80 km track, a train travels 40 km with a uniform speed of 30 km h-l. How fast must the train travel the next 40 km so as to have average speed 40 km h-l for the entire trip ? Ex at 8.00 aarrow_forwardQ5) A man starts from the origin and walks 20 m along the positive x-axis. He then turns around and moves 12 m along the negative x-axis. If the time of the whole trip is 6 s, then his average speed (in m/s) is A) 5.3 B) 1.3 C) 3.3 D) 0 E) 2.0arrow_forward
- # 5) There is a high-speed police chase on 1-64! The driver of a police car heading East pulls off into an emergency turn around on 1-64 so that he can turn around and join the pursuit, which is moving on the westward side of the interstate. In order to successfully merge with constant acceleration, the police car starts from rest, moves in a straight line, and has a speed of 24.0 m/s when it reaches the end of the merge lane, which has a total length of 80.0 m. Report answers below to 3 sig figs. A) What is the magnitude of the constant acceleration of the police during merging? B) How much time does it take the police car to travel the full length of the merging lane? C) The traffic on 1-64 is moving at a constant speed of 17.0 m/s. What distance does the traffic travel while the police car is moving the length of the merging lane?arrow_forwardelearn.squ.edu.om/mod/quiz/ NG SYSTEM (ACADEMIC) al Physics I- Spring21 Time left 0:18:56 The runway of an airport in Oman has been designed such that the lowest acceleration for a plane to take off is 14.3 m/s?. The take-off speed for this plane will be 54.9 m/s. Assuming this minimum acceleration, then the minimum allowed length (m) for the runway is: O a. 105.38 O b. 52.69 O c. 421.54 O d. 210.77 A car travels along the vector d1 = 4.6i+3.1 (m). and then travels along the vector d2 = 2,41+5.81(m). How far isarrow_forwardQ) Imagine a car involves into 10 نقاط freeway traffic on a 200m long road distance. If its initial velocity is 25 mph and it accelerates at 2.0 m/s2, how long does it take to travel the ? 200m distance إضافة ملفarrow_forward
- Can an object be increasing in speed as its acceleration decreases? If so, give an example. If not, explain.arrow_forwardThe takeoff time t = 2.42 s looks as a reasonable numerical value. Example 2-2 You are driving down the highway late one night at 58 mph when a deer steps into the road 50 m (about 164 ft) in front of you. Your reaction time before stepping on the brakes is 0.5 s, and the maximum deceleration of your car is 9.1 m/s². How much distance is between you and the deer when you come to stop? SOLUTION:arrow_forwardDoes an odometer in a car measure distance or displacement?Explainarrow_forward
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