You are working out on a rowing machine. each time you pull the rowing bar (which simulates the "oars") toward you, it moves a distance of 1.0 m in a time of 1.7 s. the readout on the display indicates that the average power you are producing is 82 w. what is the magnitude of the force that you exert on the handle?

 139.4 N

Explanation:

from the question we are given the following

distance (s) = 1 m

time (t) = 1.7 s

power (p) = 82 W

force (f) = ?

we can get the force by applying the formula below

power = work done / time

where work done = force x distance

therefore power = (force x distance ) / time

82 = (f x 1) / 1.7

f = (82 x 1.7) / 1 = 139.4 N

if a star is moving toward earth, its light waves appear to be squeezed together. hope it