The table shows test data for a corvette, one of the fastest cars made in the US. The car is moving in a straight line (the x-axis).

Time (s) 0/2.10/20.0/53.0
Speed (mi/h) 0/60.0/210/255
1. Calculate the car's average acceleration (in m/s2) between 2.1 s and 20.0 s.
2. Calculate the car's average acceleration (in m/s2) between 20.0 s and 53 s.

Question

The table shows test data for a corvette, one of the fastest cars made in the US. The car is moving in a straight line (the x-axis).

Time (s)	        0/2.10/20.0/53.0
Speed (mi/h)	0/60.0/210/255
1. Calculate the car's average acceleration (in m/s2) between 2.1 s and 20.0 s.
2. Calculate the car's average acceleration (in m/s2) between 20.0 s and 53 s.

anonymous · Answer

i know that the speed at time 2.1 is 26.8224 m/s  and at 20 is 93.8784 m/s
but i get the wrong answers w/ 60.3, 60 and 60.35.

anonymous · Answer

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looking at the picture, acceleration becomes the slope of the line at any given location.

so acceleration = m = (y2-y1) / (x2-x1)

I think you can figure out what to put in for the x's and y's