Problem 1: A uniform meter stick has a 60.0 g mass placed at the 20 cm mark. A pivot is placed at the 42.5 cm mark and the mass of the meter stick
20
4225
30
is 125g
At which mark on the meter stick do you need
60g
to attach a 50-g mass so it remains horizontal
in static equilibrium? (You must draw a force
diagram)

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

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