The load L is lowered by the two pulleys which are fastened together and rotate as a single unit. For the instant represented, drum A has a counterclockwise angular velocity of 3.9 rad/sec, which is decreasing by 6.6 rad/sec each second. Simultaneously, drum B has a clockwise angular velocity of 6.2 rad/sec, which is increasing by 3.3 rad/sec each second. Calculate the accelerations of points C and D and the load L.

the answer is b, have negligible mass

this could be newton#'s law of cooling. the cooling curve is exponential

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.