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jehan4141
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You can find this problem with supplemental pics on page 6 at http://www.physics.princeton.edu/~mcdonald/examples/ph101_2006/learning_guide_ph101_2006.pdf
Suppose that the maximum possible acceleration for passengers standing on a subway is 0.1 m/s^2 and that two subway stations are 0.7 km apart.
What is the minimum possible time taken between the two subways stations?
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The answer is 170 seconds. I keep getting 118 seconds :(
My calculations are as follows:
x = (0.5)(acceleration)(time^2) where x = 700 meters and acceleration is 0.1
thus, sqrt(2x/acceleration) = time = 118
Can anybody tell me what I am doing wrong?
Suppose that the maximum possible acceleration for passengers standing on a subway is 0.1 m/s^2 and that two subway stations are 0.7 km apart.
What is the minimum possible time taken between the two subways stations?
___________________________________________________________________
The answer is 170 seconds. I keep getting 118 seconds :(
My calculations are as follows:
x = (0.5)(acceleration)(time^2) where x = 700 meters and acceleration is 0.1
thus, sqrt(2x/acceleration) = time = 118
Can anybody tell me what I am doing wrong?
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