Aspring stores 3500 j of energy when it is stretched 1.5 meters. what is the spring constant of this spring? a) 4667 n/m b) 778 n/m c) 3938 n/m d) 3111 n/m

As we know that spring potential energy is given by the formula

now it is given to us that

now we will plug in data in above equation

now we will have

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