A 20.0kg object is pulled horizontally along a level floor with a force of 27.0N. If the object is accelerating at a rate of 0.80m/s2, what is the magnitude of the force of friction?

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.