If a 3 kilogram iron ball is acted upon by a force of 3 newtons, what will be the result?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

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?