simple kinematics question i think i am right just need to confirmby ihatecats2014 Tags: confirm, kinematics, simple 

#1
Aug2910, 10:36 PM

P: 31

1. The problem statement, all variables and given/known data
At t=0 a ball, initially at rest, starts to roll down a ramp with constant acceleration. You notice it moves 1 foot between t=0 seconds and t = 1 second. How far does it move between t = 1 second and t = 2 seconds 2. Relevant equations delta x=v_{i}t+1/2at^{2}? since it is constant speed wouldn't acceleration be 0? 3. The attempt at a solution it seems like it would be 1 foot right? = 1(1)+1/2(0)(1)^{2} delta x=1foot? 



#2
Aug2910, 10:50 PM

HW Helper
P: 6,210

No the acceleration would not be zero. If it were zero, then the ball would not move.




#3
Aug2910, 11:06 PM

P: 31

then =0(1)+1/2(1)(1)^2 delta x equals 1/2 foot this is wrong. i need a hint please or if the time is 2sec the distance would then be 2 foot. but i think that is still wrong 



#4
Aug2910, 11:17 PM

HW Helper
P: 6,210

simple kinematics question i think i am right just need to confirmUsing this equation a≠1 ft/s^{2}. 


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