A rock is launched into the air with a velocity of 12.7 m/s at an angle of 32° off the horizontal ground. Which of the following is true? a) The acceleration is 9.8 m/s to the right. b) acceleration is 9.8 m/s to the left. c) acceleration is 9.8 m/s upward. d) The acceleration is 9.8 m/s downward. e) none of the above

it is called kinetic energy

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

force tends to be low and long diustance masses are high

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