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Basic Physics PHY 114 W-01 Department of Physical and Computer Sciences Medgar Evers College Assignment 2 Name: Write or type work and solutions on a separate paper. If written, write legibly. 1. The velocity of a car decreases from 30 m/s to 18 m/s in a time of 1 minute. What is the average acceleration of the car in this process? 2. A runner traveling with an initial velocity of 2.00 m/s and accelerates at a constant rate of 1.20 m/s2 for a time of 10 seconds. a. What is his velocity at the end of this time? b. What distance does the runner cover during this process? 3. A car traveling at a constant velocity of 40.2 km/hr for 20 minutes; and then, it deccelarates at a constant rate of 10 km/hr2 a. How long does it take for the car to stop? b. What is the total distance covered by the car when it stops? 4. Extra Credit: If a particle is moving in a line with a velocity function of (t) 2(t -3)?+t+1 m/s what is the instantaneous acceleration of the particle at t = 1 and t 3?
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