Respuesta :
					                   the answer is (b). free fall due to gravity is 9.8m/s squared, which in this case is expressed as 9.8m/s since there is no exponent to represent m/s squared. 
don’t get confused with (c)- that is expressing 9.8 metres to the second per second which is incorrect.
					                
					             don’t get confused with (c)- that is expressing 9.8 metres to the second per second which is incorrect.