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Resources previous 12 of 25 | next Problem 9.9- Enhanced-with Feedback Problem 9.9- Enhanced-with Feedback Part A A child is siding on a sled at 1.8 m/s to the right. You stop the sled by pushing on it for 0.30 s in a direction opposite to its motion lfthe mass ofthe child and sled is 39 kg , what is te magnitude of the average force you need to apply to stop the sled? Use the concepts of impulse and momenturm Express your answer to two significant figures and include the appropriate units. You may want to review ( pagm261-262) F Value Units Submit My Answers Give Up Provide Feedback Continue 29

Explanation / Answer

from impulse momentum theorm

F = impulse / time

= (39 kg)(1.8 m/s) / 0.30 s

= 234 N

roundong to two significant figure F = 230 N

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