A coin placed on the cover of a book just begins to move when the cover makes an angle of 38o with the horizontal. What is the coefficient of static friction?

this one:

as we gain mass the force of gravity on us increases.

pls mark me as the ! : d

i think the answer is a, hope this : )

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