A 2.80 kg mass is dropped from a height of 4.50 m. Find its potential
energy (PE) when it is 1.50 m
above the ground.

41.2J

Explanation:

Info given:

mass (m) = 2.8kg

height1 (h) = 4.5m

height2 (h2) = 1.5m

gravity (g) = 9.81m/s^2

Find PE when at h2

PE = mgh

Plug in info:

mgh = (2.8kg)(9.81m/s^2)(1.5m) = 41.2J

PE = 41.2J at 1.5m above ground.

close lines strong magnet less close weaker

so easy. just google the electromagnetic waves and it’ll pop up.