A projectile of mass 2.0 kg is fired with an initial speed of 10 m/s at an angle of 30o above the horizontal. The potential energy of the projectile-Earth system when the projectile is at its highest point (relative to the potential energy when the projectile is at ground level) is:

U = 25J

Explanation:

In order to calculate the potential energy of the projectile-Earth system, when the projectile is at its maximum height, you use the following formula for the potential energy:

          (1)

M: mass of the projectile = 2.0kg

g: gravitational acceleration =  9.8m/s²

hmax: maximum height reached by the projectile.

The maximum height is given by the following formula:

         (2)

vo: initial speed of the projectile = 10 m/s

θ: angle at which projectile was fires = 30°

You replace the expression (2) into the equation (1) and replace the values of all parameters:

Hence, the potential energy of the projectile-Earth system is 25J

-4 on

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!