You throw a 3.00-n rock vertically into the air from ground level. you observe that when it is 15.9 m above the ground, it is traveling at 25.7 m/s upward.

a)use the work-energy theorem to find the rock's speed just as it left the ground.

b)use the work-energy theorem to find its maximum height.

a) u = 31.197 m/s

b)

Explanation:

given,

weight = 3 N

mass = 3/ 9.81 = 0.305 kg

h = 15.9 m

velocity at which it is traveling upward = 25.7 m/s

a) using work energy principle

u = 31.197 m/s

b) At maximum height

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)