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What force is needed to give a 4.5-kg bowling ball an acceleration of 9 m/s2?

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What force is needed to give a 4.5-kg bowling ball an acceleration of 9 m/s2? 

[tex]F = ma F = 4.5 x 9[/tex]

40.5 N
f=ma  
f=4.5*9                                           

40.5 N
hope this help