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A force of 25N causes an acceleration of 2m/s^2 when acting on a 7kg mass. What is the frictional force also acting?

If body is moving then frictional force is at its maximum. acceleration in direction of friction is -2
M=7. a=-2
F= frictional force opposing movement
F=Ma F= 7x-2 = -14
Therefore the frictional force is 14 N

thanks for that

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