There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target. a pilot flying low and slow drops a weight; it takes 3.0 s to hit the ground, during which it travels a horizontal distance of 170 m. now the pilot does a run at the same height but twice the speed. how much time does it take the weight to hit the ground?

Also 3s.

Explanation:

Each component is independent in two dimensional motion. This means that how much time does something take to reach the ground when dropped is independent from any horizontal velocity. If at one run a drop lasts 3s, at another run with twice the (horizontal) velocity and same height will also last 3s, no matter what.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .