Aball is thrown straight up. at what point does the ball have the most energy? ignore air resistance.

a. at the highest point of its path.
b. when it is first thrown.
c. just before it hits the ground.
d. everywhere; the energy of the ball is the same at all of these points.
e. when the ball is halfway to the highest point of its path.

Everywhere; the energy of the ball is the same at all of these points.

Explanation:

A ball is thrown straight up. The total energy of an object remains constant as per the law of conservation of energy. At the highest point the object have only potential energy and at lowest point it have only kinetic energy. As a result, the total energy remains constant.

So, at every point the energy of the ball is the same at all of these points. Hence, the correct option is (d).

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

there are no contact forces mentioned on the list of choices that you've provided.