The 25-kg block is attached to link AB and rests on a moving belt. Knowing that μs= 0.30 and μk= 0.25 and neglecting the weight of the link, determine the magnitude of the horizontal force P that should be applied to the belt to maintain its motion (a) to the left, (b) to the right. (Round the final answers to one decimal place.)

a

explanation:

because they are cartillidge

not too sure thinking all accelerations are pointed down

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