Which of these requires an increase in power? * Doing half as much work in the same amount of time
Doing the same amount of work in half the time
Doing the same amount of work in twice as much time
Doing twice as much work in twice as much time

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

attach the statements so i can answer : )

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.