Nomor 1
Diketahui:
m = 100 lbm
v = 10 ft/s
Pertanyaan:
Ek?
Jawab:
Ek = ½ mv2
= ½ × 100 lbm × (10 ft/s)2 / gc
gc = 32,174 (ft lbm)/(s^2 lbf)
Ek = 155,404 ft.lbf
= 155 ft.lbf
Nomor 2
Diketahui:
m = 100 lbm
g = 32,2 ft/s^2
h = 10 ft
Pertanyaan:
Ep?
Jawab:
Ep = mgh
= 100 lbm × 32,2 ft/s^2 × 10 ft/gc
= 1000,808 ft.lbf
= 1001 ft.lbf