With what magnitude of force does a ball of mass 0.75 kilograms need to be hit so that it accelerates at the rate of 25 meters/ second 2 ? assume that the ball undergoes motion along a straight line.
a. 10 newtons
b. 19 newtons
c. 33.3 newtons
d. 40 newtons

Do you remember seeing Newton's 2nd Law ?

                                   F = m A

                               Force = (mass) x (acceleration)

The question tells you the mass and the acceleration. 
All YOU have to do is take the numbers and pluggum
into Newton's 2nd law.

                               F  =  m  A

                                   =  (0.75 kg) (25 m/s²)

                                   =  (0.75 x 25)  kg-m/s²

                                   =       18.75 Newtons  .   

Notice that this is the ball's acceleration only as long as the force is
acting on it.  If it's a hit, then as soon as the ball leaves the bat, it stops accelerating ... it just sails away at whatever speed it had when the bat
stopped pushing it.

Idon't understand is there supposed to be a list or something if there is pm or add in under this message i will do my best to .