Mary spins a ball in a horizontal circle on a massless string. karen has a similar ball but
wants to spin hers faster. what could karen do to make it easier to start spinning the
mass from rest?
a. spin the ball on the moon
b. use a lighter ball
c. use a heavier ball
d. make a string longer

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.

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.