What is the acceleration of a 50 kg object pushed with a force of 500 newtons? known? unknown? calculation? answer? units? equation?

Why should seat belts not be mandatory quick plz

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?