Two small rings each of weight w can slide on a fixed rough horizontal rod. the rings are attached one to each end of a uniform chain of weight 4w and length 4a so that the chain hangs freely from the rings. if the coefficient of friction between each ring and the rod is 1/2, find the distance between the rings when they are in limiting equilibrium. prove that the lowest point of the chain is then at a depth a below the rod.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

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.