A 4.5 kg block is pulled across a table by a horizontal force of 42 N. The frictional force opposing the motion is 7.5 N. Calculate the acceleration of the object.

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f