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OpenStudy (anonymous):
John pushes his brother Danny on a skateboard. John applies a force of 39 N and Danny's acceleration is 0.9 m/s2. What is the combined mass of Danny and his skateboard? A. 43 kg B. 35 kg C. 31 kg D. 48 kg
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OpenStudy (anonymous):
\[Force=mass*acceleration\]
OpenStudy (anonymous):
39/0.9=43
OpenStudy (shamim):
U know F=ma 39=m*0.9 m=?
rvc (rvc):
@tamela12 u just need to to the formula then put in the values and get the answer :)
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