Four different boxes of physics textbooks are on a table. The weight of each box is balanced by an upward force or normal force provided by the table. Each box (A–D) is subjected to different horizontal forces as shown in the free-body diagrams below.

What is the magnitude of the acceleration, in m/s2, of the box of books labeled D?

car stops. he keeps going = he has inertia

k2s for potassium sulphide

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.

80cm/s.

24cm/s.

53.3cm/s.