Question

a person picks up a snowball with a mas of 150 grams from the ground to a heigh of 180 cm and then throws it with a speed of 12m/s.what is the work done by person on the snowball?​

Answer 1

Answer:

146.721 J

Explanation:

by using standard unit, assuming gravitational acceleration is g =9.8 m/s², and using well known formula, we get

$W=E_p+E_k

\\=mgh+0.5mv^2

\\=(0.15)(9.8)(1.8)+0.5(0.15)(12)^2

\\=146.721$