Q1. a car starts from rest and accelerates uniformaly around a half circle track
ID: 1760102 • Letter: Q
Question
Q1. a car starts from rest and accelerates uniformaly around a half circle track with radius 150 m. if the cartakes 8.0 seconds to complete the half circle: A. wht's the car's average velocity? B. what's the car's velocity at the end? C. what's the car's acceleration? Q2. when it hits the catcher's mitt, apitched baseball goesfrom 40m/s to 0m/s over a distance of 0.2 m. Assuming constantacceleration: A. what is the acceleration of the baseball? B. what is the average velocity of the baseball during itscontact with the mitt? Q1. a car starts from rest and accelerates uniformaly around a half circle track with radius 150 m. if the cartakes 8.0 seconds to complete the half circle: A. wht's the car's average velocity? B. what's the car's velocity at the end? C. what's the car's acceleration? Q2. when it hits the catcher's mitt, apitched baseball goesfrom 40m/s to 0m/s over a distance of 0.2 m. Assuming constantacceleration: A. what is the acceleration of the baseball? B. what is the average velocity of the baseball during itscontact with the mitt?Explanation / Answer
Q1) radius of track, r = 150 m timetaken, t = 8 s A)Average velocity = displacement / time = 2 r / t = 2 * 150 / 8 = 37.5 m/s B) averagevelocity = ( u + v) / 2 where u = initial velocity = 0 v = final velocity 37.5 = v / 2 v = 75 m / s C) Acceleration, a = (v - u) / 2 = 37.5 m/s 2 Q2) u= initial velocity = 0 m/s v = final velocity = 40 m/s s = distance = 0.2 m A) acceleration, a = (v 2 - u 2) / 2 s =1600 / 0.4 = 4000 m/s 2 B)Average velocity, V av = (u + v) / 2 = 20 m/s Q2) u= initial velocity = 0 m/s v = final velocity = 40 m/s s = distance = 0.2 m A) acceleration, a = (v 2 - u 2) / 2 s =1600 / 0.4 = 4000 m/s 2 B)Average velocity, V av = (u + v) / 2 = 20 m/s B)Average velocity, V av = (u + v) / 2 = 20 m/sRelated Questions
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