A4-kg block and a 2-kg block can move on the horizontal frictionless surface. the blocks are accelerated by a+12-n force that pushes the larger block against the smaller one. determine the force that the 2-kg block exerts on the 4-kg block.
a) -4 n
b) -12 n
c) 0 n
d) +4 n
e) +8 n

Explanation:

Net external force that exerted on the block is given as

here we know that

now we have

so we have

now the force exerted by bigger block on smaller block is given as

now we know that two blocks will exert equal and opposite force on each other

so here the force exerted by 2 kg block on 4 kg block will be

answerscientific theory;