A man is pushing a 50 kg box across a rough floor, if he applies a force of 550 N to the box but there is a 100 N resistive force from the floor, what is the
acceleration of the box?

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.