Question

Suppose that a constant force is applied to an object. newton's second law of motion states that the acceleration of the object varies inversely with its mass. a certain force acting upon an object with mass 3 kg produces an acceleration of 15 /ms2 . if the same force acts upon another object whose mass is 5 kg , what would this object's acceleration be?

Answer 1

Solve for "x"
X = speed of the 5 kg 
3/15=5/x
cross multiply 
3x=75 
because (15)(5)=(3)(x)
divide 3 in both side
X=25 
or 
A=25 m/s^2 
Hope this helps