roblem 8.39 Part A Your little sister (mass 25.0 kg) is sitting in her little re

Question

roblem 8.39 Part A Your little sister (mass 25.0 kg) is sitting in her little red wagon (mass 8.30 kg) at rest. You begin pulling her forward and continue accelerating her with a constant force for 2.60s at the end of which time she's moving at a speed of 1.80 m/s. Calculate the impulse you imparted to the wagon and its passenger. Express your answer to three significant figures with the appropriate units. x-10 J-153.3 IN. Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining; no points deducte One or more of the units you entered is not recognized. Click help to view a list a Part B With what force did you pull on the wagon? Express your answer to three significant figures with the appropriate units. F 21 re to search

Explanation / Answer

(A) impulse = change in momentum

J = (25 + 8.30) (1.80 - 0 )

J = 59.94 kg m/s Or N s

(B) Impulse = F t

59.94 = F (2.60)

F = 23 N  

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