Review Conceptual Example 6 as background for this problem. A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 30.5 m/s, and during a 8.01-second interval, it changes to a final speed of (a)41.9 m/s and (b)16.4 m/s. In each case, find the acceleration (magnitude and algebraic sign). (a) Number +1.42 (b) Number -1.76 Units Units m/s^2 m/s^2

Review Conceptual Example 6 as background for this problem. A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 30.5 m/s, and during a 8.01-second interval, it changes to a final speed of (a)41.9 m/s and (b)16.4 m/s. In each case, find the acceleration (magnitude and algebraic sign). (a) Number +1.42 (b) Number -1.76 Units Units m/s^2 m/s^2

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A car starts from rest with an acceleration of 7.7 m/s² which decreases linearly with time to zero in 10.7 seconds, after which the car continues at a constant speed. Determine the time t required for the car to travel 560 m from the start. Answer: t = i S
Please answer all question parts: A Lockheed Martin F-35 Lightning II jet takes off from an aircraft carrier with a runway length of 97 m and a takeoff speed 72 m/s at the end of the runway. Jets are catapulted into airspace from the deck of an aircraft carrier with two sources of propulsion: the jet propulsion and the catapult. At the point of leaving the deck of the aircraft carrier, the F-35's acceleration decreases to a constant acceleration of 4.3 m/s2 at 33° with respect to the horizontal. (Assume that the F-35's initial direction along the deck of the aircraft carrier is the +x-direction and that the +y-direction is up.) (a) What is the initial acceleration (in m/s2) of the F-35 on the deck of the aircraft carrier to make it airborne? (Enter the magnitude.) (b) Write the position (in m) and velocity (in m/s) of the F-35 in unit vector notation from the point it leaves the deck of the aircraft carrier. (Use the following as necessary: t.) (c) At what altitude (in m) is…
An object is subject to a constant acceleration of 4.16 m/s2 in the positive x direction. If it is initially at rest, what is its displacement in the x-direction at t = 8.99 s?
A car starts from rest with an acceleration of 5.7 m/s² which decreases linearly with time to zero in 8.2 seconds, after which the car continues at a constant speed. Determine the time t required for the car to travel 240 m from the start. Answer: t = i S
Review. You are sitting in your car at rest at a traffic light with a bicyclist at rest next to you in the adjoining bicycle lane. As soon as the traffic light turns green, your car speeds up from rest to 49.0 mi/h with constant acceleration 8.00 mi/h/s and thereafter moves with a constant speed of 49.0 mi/h. At the same time, the cyclist speeds up from rest to 22.0 mi/h with constant acceleration 14.00 mi/h/s and thereafter moves with a constant speed of 22.0 mi/h. (a) For what time interval (in s) after the light turned green is the bicycle ahead of your car? S (b) What is the maximum distance (in ft) by which the bicycle leads your car during this time interval? ft
A motorcycle has a constant acceleration of 3.95 m/s². Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its speed from (a)19.4 to 29.4 m/s, and (b)49.4 to 59.4 m/s? (a) Number i Units (b) Number i Units
Assume you are driving a car at a constant speed of 76 km/h. Suddenly you see a deer standing on the highway and you must put on the brakes. Your reaction time (time elapsed between the moment you see the deer and your foot hitting the brakes) is 0.118 s. The brakes provide an acceleration with a magnitude of 4 m/s2, and a direction opposite the initial velocity. How do you find the total distance traveled?
A football player, starting from rest at the line of scrimmage, accelerates along a straight line for a time of 3.49 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.37 m/s2. With this acceleration, he continues in the same direction for another 1.35 s, until he reaches a speed of 7.64 m/s. What is the value of his acceleration (assumed to be constant) during the initial 3.49 -s period? Number i Units
A train is initially travelling along a straight track at a steady speed of 30 m s¯¹. At time t = 0.00 s a signal ahead turns red. It takes the driver 0.60 s to react and apply the brakes. Once the brakes are hit, the train decelerates with a constant acceleration of magnitude 9.0 m s2 until it comes to rest. What is the total distance travelled by the train in the period between the signal turning to red and the train coming to rest? Give your answer by entering a number (correct to an appropriate number of significant figures) in the empty box below. Total distance travelled = m.
A person hits a trampoline while moving downward with a speed of 9 m/s and rebounds a short time later with roughly the same speed upward. If the person is in contact with the trampoline for about 1.8 s, what are the magnitude and direction of the person’s average acceleration during this time interval? (Hint: You can ignore the effects due to gravity
An ambulance driver is rushing a patient to the hospital. While traveling at 71.1 km/h, she notices the traffic light at the upcoming intersection has turned yellow. To reach the intersection before the light turns red, she must travel 52 m in 2.17 seconds. What is the magnitude of the minimum acceleration, in m/s2, required to reach the intersection before the light turns red?