Question

if a body of mass 16 kg, dropped from height H when it reaches the ground its momentum becomes 640 N. the value of H is

Answer 1

m = 16kg
h = ?
p = 640N
g=9.8m/s²

p = mv
640 = 16v
v = 640/16 = 40m/s

g = v-u/t
9.8 = 40/t
t = 40/9.8 = 4.08s

height = 40×4.08
= 163.2m