When a force F is acting on an object of mass m, the acceleration of the object is (Newton's second law)
[tex]a= \frac{F}{m} [/tex]
The first object has a mass of 10 kg and a force of 20 N is acting on it, so its acceleration is
[tex]a_1= \frac{20 N}{10 kg}=2 m/s^2 [/tex]
The second object has a mass of 18 kg and a force of 30 N is acting on it, so its acceleration is
[tex]a_2= \frac{30 N}{18 kg}=1.67 m/s^2 [/tex]
So, the first object has higher acceleration.
