If the mass of the child and sled is 31kg what average force do you need to apply to stop the sled? Use the co?
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Answer:
hai Chris, let a be the acceleration to be found out. Then force applied on the sledge is 31 a in newton. To find the value of a, let us use the expression v = u - at Here v = 0 and u = 1.6 m/s and t = 0.4 s, so a = 1.6/0.4 = 4 m/s^2 Hence the average force = 31*4 = 124 N.
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Other answers
hai Chris, let a be the acceleration to be found out. Then force applied on the sledge is 31 a in newton. To find the value of a, let us use the expression v = u - at Here v = 0 and u = 1.6 m/s and t = 0.4 s, so a = 1.6/0.4 = 4 m/s^2 Hence the average force = 31*4 = 124 N.
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