physics - F4 mechanics
2017/07/04 08:56
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physics - F4 mechanics
acceleration = 60g 點解會等於 60 X (-10) = - 600 m/s ??
最佳解答:
first, I think you copied the wrong unit, I think it should be -600 m/s^2 the 'g' in 60g (as an acceleration figure) is not gram, but the earth's gravitational acceleration. g is normally taken as 9.81m/s^2, for simply approximately, sometimes as 10 m/s^2. I guess you are dealing with vertical motion and the negative accleration is a matter of sign convention, e.g. if positive is downloads, your acceleration is upward, vice versa. For the magnitude, 60g = 60 x 10m/s^2 = 600m/s^2 2008-07-15 02:43:35 補充： yeap, sorry, if the sign convention is positive downwards, acceleration upwards will be represented as negative
其他解答:
do you mean take downwards as positive (not downloads)
physics - F4 mechanics
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發問:acceleration = 60g 點解會等於 60 X (-10) = - 600 m/s ??
最佳解答:
first, I think you copied the wrong unit, I think it should be -600 m/s^2 the 'g' in 60g (as an acceleration figure) is not gram, but the earth's gravitational acceleration. g is normally taken as 9.81m/s^2, for simply approximately, sometimes as 10 m/s^2. I guess you are dealing with vertical motion and the negative accleration is a matter of sign convention, e.g. if positive is downloads, your acceleration is upward, vice versa. For the magnitude, 60g = 60 x 10m/s^2 = 600m/s^2 2008-07-15 02:43:35 補充： yeap, sorry, if the sign convention is positive downwards, acceleration upwards will be represented as negative
其他解答:
do you mean take downwards as positive (not downloads)
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