You drop a penny down a well. Right before it hits the ground, the penny's velocity is 9 m/s. How long did the penny fall?

the inner core.

good luck: )

klicker

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west