Posted by Anonymous on Wednesday, September 15, 2010 at 10:57pm.
A 3.00kg block starts from rest at the top of a 30.0 degree incline and accerlates uniformly down the incline moving 2.00 m in 1.50 s. find the magnitude of the accerlation of the block

physics  TutorCat, Wednesday, September 15, 2010 at 11:58pm
The distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time)
distance= 2m
find acceleration.

physics  drwls, Thursday, September 16, 2010 at 12:01am
They have provided more information than you need to answer the question. That is to done to give you practice in knowing what to use and what to ignore.
The average speed is 2/1.5 = 4/3 m/s. The final speed is twice that, or 8/3 m/s
The acceleration is the final speed divided by the time
a = (8/3)/(3/2) = 16/9 = 1.78 m/s^2
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