Question 78 please increase its speed from 100 m/s to 160 m/s?A) 0.25 sB) 0.058 sC) 17 sD) 4.0 sSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.77)The captain orders his starship to accelerate from rest at a rate of "1 g" (1 g = 9.8 m/s2).How many days does it take the starship to reach 10% the speed of light? (Light travelsat 3.0 × 108 m/s.)MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.78)76) A car is traveling north at 17.7 m/s. After 12 s its velocity is 14.1 m/s in the same direction. Findthe magnitude and direction of the car's average acceleration.A) 2.7 m/s2, northB) 2.7 m/s2, southC) 0.30 m/s2, northD) 0.30 m/s2, south79) A racquetball strikes a wall with a speed of 30 m/s and rebounds in the opposite direction with aspeed of 26 m/s. The collision takes 20 ms. What is the average acceleration of the ball during the79collision with the wall?A) 200 m/s2B) 0 m/s2C) 2800 m/s2D) 1300 m/s2E) 1500 m/s280) The velocity v(t) of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s2)t - (6.2m/s3)t2. What is the average acceleration of the particle between t = 1.0 s and t = 2.0 s?A) 13 m/s2B) 0 m/s2C) -15 m/s2D) -13 m/s2E) 15 m/s2HORT ANSWER. Write the word or phrase that best completes each statement or answers the question81).81) If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80km/hr, starting from rest?

78. According to the kinematics equation, find the average acceleration of the car,…

78) A car is traveling north at 17.7 m/s. After 12 s its velocity is 14.1 m/s in the same direction. Find the magnitude and direction of the car's average acceleration. A) 2.7 m/s2, north B) 2.7 m/s2, south D) 0.30 m/s2, south C) 0.30 m/s2, north

78) A car is traveling north at 17.7 m/s. After 12 s its velocity is 14.1 m/s in the same direction. Find the magnitude and direction of the car's average acceleration. A) 2.7 m/s2, north B) 2.7 m/s2, south D) 0.30 m/s2, south C) 0.30 m/s2, north

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 9P: A hare and a tortoise compete in a race over a straight course 1.00 km long. The tortoise crawls at...

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