Calculate the potential energy of a stone of mass 0.5g thrown vertically upward with a velocity of 10m/s. calculate: 1. The potential energy at the greatest height and value of h
2. The kinetic energy on reaching the ground again

the answer is a 3.8cm

explanation:

we need to know the time interval during which the force acts. impulse of force = momentum change

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

i would say