Question

A 10-kg mass is projected straight up with a speed of 20.0 meter/second.

1. Find the initial kinetic energy of the mass

2. To what height does the mass rise?

Answer 1

1. KE = 0.5m*V^2 = 5*20^2 = 2000 Joules

2. V^2 = Vo^2 + 2g*h =
h = (V^2-Vo^2)/2g
h = (0-20^20/-19.6 = 20.4 m.

Answer 2

Correction: h = (0-20^2)/-19.6 = 20.4 m.