4-(a) The velocity of a particle changes from vị = 2î + 5ĵ -3k m/s toV2 = 5î - 7ĵ+ 2k m/s in 2 s. What is its average acceleration?(b) A particle has an acceleration of a = -7î +3ĵ m/s² for a period of 4 s. After thistime the velocity is V2 = 6î - 2k m/s. What was the initial velocity?

(a) The given values with suitable variables are listed below. Here, v1 denotes the initial…

Answered: 4- (a) The velocity of a particle…

Physics for Scientists and Engineers

10th Edition

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 21P: A glider of length 12.4 cm moves on an air track with constant acceleration (Fig P2.19). A time...

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A glider of length 12.4 cm moves on an air track with constant acceleration (Fig P2.19). A time interval of 0.628 s elapses between the moment when its front end passes a fixed point along the track and the moment when its back end passes this point. Next, a time interval of 1.39 s elapses between the moment when the back end of the glider passes the point and the moment when the front end of the glider passes a second point farther down the track. After that, an additional 0.431 s elapses until the back end of the glider passes point . (a) Find the average speed of the glider as it passes point . (b) Find the acceleration of the glider. (c) Explain how you can compute the acceleration without knowing the distance between points and .
What are the two roots of the equation (4.9 m/s2)t2 –(30 m/s)t + (3 m) = 0? (t has the unit of seconds.) - 0.102 s, 6.021 s - 0.102 s, - 6.021 s 0.102 s, 6.021 s
A student is testing the UAM equations by measuring the time it takes for light-weight plastic balls to fall to the floor from a height of 5 m in the lab. The student predicts the time to fall using g as 9.80 m/s^2 but finds the measured time to be 42.5% greater. Which of the following is the most likely cause of the large percent error? a. The acceleration due to gravity is 57.5% greater than 9.80 m/s^2 at this location. b. The acceleration due to gravity is 57.5% less than 9.80 m/s^2 at this location. c. Air resistance increases the downward acceleration. d. The acceleration of the plastic balls is not uniform. e. No Answer
An object has a velocity of (5.4 m/s)i -(4.8 m/s)j. Over a period of 1.3 s, its velocity changes to (1.7 m/s)i + (5.9 m/s)j. What is its acceleration? Group of answer choices a) -(3.7 m/s)i +(11 m/s)j b) -(2.8 m/s)i+(8.2 m/s)j c) (3.7 m/s)i+(11m/s)j d) (2.8 m/s)i+(8.2 m/s)j e) -(2.8 m/s)i+(1.1 m/s)j
Started at the same time from a very flat surface and 8 mm apart, (two snails are vertically climbing up a wall at uniform speeds. If one of the snails is climbing at the rate 2 mms. while the other is 3 mm/s faster than the first, determine how fast they are separating from each other after 5 seconds they started A. 45/17 mm/s B. 2mm/s C. 34/6 D.67/39
Dr. John Paul Stapp was a U.S. Air Force officer who studied the effects of extreme acceleration on the human body. On December 10, 1954, Stapp rode a rocket sled, accelerating from rest to a top speed of 282 m/s (1015 km/h) in 5.00 s and was brought jarringly back to rest in only 1.40 s. Calculate his (a) acceleration in his direction of motion and (b) acceleration opposite to his direction of motion. Express each in multiples of g (9.80 m/s2) by taking its ratio to the acceleration of gravity.
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A particle is moving along the x-axis in accordance with the following: x(t) = 5 cos (4πt + π/3) cm At what times is x = 0? a) t = 1/24 s, 7/24 s, 13/24 s, etc. b) t = 1/6 s, 5/12 s, etc. c) none of these
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