College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A car accelerates from 13.94 km/h to 60.85 km/h in 4.83 seconds. What is the value of the acceleration?
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- The citizen leaves a city at 3:00 p.m. It travels at 36.0 m / s when the engine of its car stops. During the next twelve seconds, the car slows down and its average acceleration is a1. Over the next six seconds, the car slows down even further, and its average acceleration is a2. The speed of the car is 28.0 m / s. The ratio of the average acceleration values is a1 / a2 = 1.50. (a) Find the speed of the car at the end of the initial twelve second interval. (b) Calculate the total distance traveled by the car before stopping.arrow_forwardA bus is traveling a constant 11.0 m/s. It passes a sports car at rest which immediately begins to accelerate at 4.0 m/s2. How long will it take the sports car to reach the bus? Answer in secondsarrow_forwardA ball is thrown straight down at 1.29 m/s and hits the ground 1.07 seconds later. How many meters did the ball travel before hitting the ground? Type your answer.arrow_forward
- A high-performance sports car can go from 0 to 100 mph (44.7 m/s) in 7.9s. a) What is the car's average acceleration? b) The same car can come to a complete stop from 30 m/s in about 3.2 s. What is its average acceleration?arrow_forwardThe driver of a car traveling down the interstate slams on the brakes, causing the car to skid to rest over a distance of 152.4 m. If the car experienced an acceleration of -15.34 m/s2 during this time, how long did it take for the car to come to rest?arrow_forwardA car is moving at a velocity of 20 m/s. The car then accelerates uniformly at 1.8 m/s2. The car continues at the same acceleration until it reaches a velocity of 25 m/s, which is the legal speed limit. What is the distance the car travels in while accelerating?arrow_forward
- Assume that you are driving a car at 10.0 km/h and then you accelerate to 80.0 km/h with an acceleration of 3.50 m/s². How much time will it take until you reach the velocity 80.0 km/h? (Provide you answer in s with two decimal places.) Your Answer:arrow_forward1. A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 45.0 min at 65.0 km/h, 16.0 min at 70.0 km/h, and 35.0 min at 40.0 km/h and spends 35.0 min eating lunch and buying gas. (a) Determine the average speed for the trip.______km/h(b) Determine the distance between the initial and final cities along the route.______kmarrow_forwardA VW Beetle goes from 0 to 42.0 mi/h with an acceleration of +2.35 m/s2. (a) How much time does it take for the Beetle to reach this speed? (b) A top-fuel dragster can go from 0 to 42.0 mi/h in 0.750 s. Find the acceleration (in m/s2) of the dragster.arrow_forward
- A motorcycle has a constant acceleration of 4.41 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time, in seconds, is required for the motorcycle to change its speed from 46.2 to 56.2 m/s?arrow_forwardA pickup truck is traveling at 30.0 m/s. The driver of the truck applies the brakes and gives the truck a uniform deceleration of 6.50 m/s2² while it travels 20.0 m. What is the speed of the truck in m/s at the end of this distance?arrow_forwardA rock is held steady over a well and dropped. 4.9 seconds later, the sound of the rock hitting water is heard. Sound travels at a constant speed of 337 m/s. How deep is the well?arrow_forward
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