The earth exerts the necessary centripetal force on an orbiting satellite to keep it moving in a circle at constant speed. which one of the following statements best explains why the speed of the satellite does not change although there is a net force exerted on it?
a) the satellite is in equilibrium.
b) the acceleration of the satellite is zero m/s2 .
c) the centripetal force has magnitude mv2 /r.
d) the centripetal force is canceled by the reaction force.
e) the centripetal force is always perpendicular to the velocity.

E) The centripetal force is always perpendicular to the velocity.

Explanation:

Due to gravity and inertia, the satellite follows a uniform circular motion. In this movement, the velocity is always tangent to the orbit and the centripetal force is directed towards the center. Therefore, there is no net acceleration in the same direction of velocity, which implies that it remains constant.

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