
#1
Mar812, 10:45 PM

P: 1

1. The problem statement, all variables and given/known data
at the instant the traffic light turns green, an auto mobile starts with a constant acceleration of 2.2 m/s^2. At the same instant, a truck travelling with a constant speed of 9.5 m/s overtakes and passes the car. a) how far beyond the traffic signal will the auto mobile overtake the truck? b) how fast will the car be travelling at that instant? 2. Relevant equations if im only given the acceleration of the car and the velocity of the truck (the implied initial velocity is 0) how am i supposed to answer any of the questions? 3. The attempt at a solution Given(car): a= 2.2 m/s^2, v1=0, d=?, t= ? given(truck): v= 9.5 m/s, v1= 0, d=? 



#2
Mar812, 10:55 PM

Emeritus
Sci Advisor
PF Gold
P: 5,198

Welcome to PF!
Write another expression for the position vs. time of the truck. At the instant the car overtakes the truck, their positions will be equal. What does this suggest that you should do with the two expressions? 


Register to reply 
Related Discussions  
FreeFall Kinematics equation how to find acceleration when just given initial speed  Introductory Physics Homework  2  
KinematicsAcceleration  Introductory Physics Homework  2  
Kinematics (distance, speed, velocity, acceleration)  Introductory Physics Homework  3  
Help with Kinematics and Acceleration  Introductory Physics Homework  7  
Difference between average speed, instantaneous speed, velocity, acceleration? help!  Introductory Physics Homework  5 