Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 98.3 N98.3 N , Jill pulls with 92.7 N92.7 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 145 N145 N . (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.

the answer is b

explanation:

v=ir = 3x15 =45 v

wavelength divides in half and speed stays the same.

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