Two adults and a child want to push a wheeled cart in the direction marked x - Problem 4.35

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4.35 •• Two adults and a child want to push a wheeled cart in the direction marked x in Fig. P4.35 (next page). The two adults push with horizontal forces F⃗1 and F⃗2 as shown. (a) Find the magnitude and direction of the smallest force that the child should exert. Ignore the effects of friction. (b) If the child exerts the minimum force found in part (a), the cart accelerates at 2.0 m/s2 in the +x-direction. What is the weight of the cart?
University Physics with Modern Physics
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After that yes, you'd have to multiply the answer he gave by g to answer the 3rd question

thelonelyking
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but shouldn't the weight be times 9.8m/s^2, as they didn't ask for mass?

glimonwinnacker