8. Calculate the impulse of a 14kg rock that starts at rest and falls to a speed of 6m/s?​

84 kgm/s

Explanation:

mvf - mvi = impulse

(14kg)(6m/s) - (14kg)(0m/s) = 84 kgm/s

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

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.