A student throws a stone upward at an angle of 45° above the horizontal. Which statement best

describes the stone at the highest point that it

reaches?

(1) Its acceleration is zero.

(2) Its acceleration is a minimum, but not zero.

(3) Its gravitational potential energy is a

minimum

(4) Its kinetic energy is a minimum

(4) Its kinetic energy is a minimum.

Explanation:

Stone experiments a parabolic motion, which is a combination of horizontal motion at constant speed and vertical uniform accelerated motion due to gravity, where effects from air viscosity and Earth's rotation are neglected. Meaning that stone represents a conservative system.

When stone reachest highest point, horizontal velocity remains unchanged and vertical velocity is zero. Acceleration remains constant and different of zero. Hence, gravitational potential energy is a maximum and kinetic energy is a minimum.

Correct answer is: (4) Its kinetic energy is a minimum.

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation: