Why is that an object of more mass attains less velocity as compared to another object of less mass on application of equal force? I know f=ma governs this but, is it related to "weight" of the body or is it just "natural"? Also another question: Suppose there are 2 objects of same mass one on earth and another one on moon. If equal force is applied on both objects, which one(moon/earth) will have much acceleration? Thanks.