Which type of force(s) will cause a change in an object's motion?

Any force that's not cancelled by another force, with identical strength but pointed the opposite way, will cause a change in the object's speed or direction (or both).

When that happens, we say that the forces on the object are "unbalanced", and the object is experiencing "acceleration".

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

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