Question

A 3 kg box is lifted from 5 m above the ground to 8 m above the ground. How much

did the box's gravitational potential energy change?

Answer 1

88.2 J

Step-by-step explanation:

The formula for GPE (gravitational potential energy) is

GPE = mgh

m (mass) is 3kg

g (acceleration in gravity) is 9.8 m/s^2. This is universal. This value doesn't change ever.

H (height) is 3m because 8m - 5m is 3m. You have to find the difference in height, to find the GPE change for the box.

You plug in all of these values in the formula.

GPE = 3 x 9.8 x 3 = 88.2 J (joules)

Joules the measurment that energy is measured in.

Answer 2

The gravitational potential energy (gpe)

gpe change:

`\tt =mg(h_2-h_1)\\\\=3* 9.8(8-5)\\\\=88.2~J`