Respuesta :
					                   m= 4kg
v= ?
momentum = Mv
so
12kgms-¹ = 4kg×v
v= 12÷4 = 3ms-¹
					                
					             v= ?
momentum = Mv
so
12kgms-¹ = 4kg×v
v= 12÷4 = 3ms-¹
					                   momentum= 12kgm/s
mass=4 kg
so,speed=momentum/mass=12/4=3m/s
					                
					                
					             mass=4 kg
so,speed=momentum/mass=12/4=3m/s
 
					                  