A motorist traveling at 70 ms^-1 passes a police man who immediately accelerates to catch the motorist. If the policeman catches the motorist in 16 seconds, what is the policeman's acceleration?​

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the