Tambayoyi 3 game da lissafin ƙarfi na al'ada
1. Toshe yana da nauyin kilogiram 5. Idan g = 10 m/s 2 , ƙayyade:
a) nauyin tubalin
b) ƙarfin da aka saba idan an sanya tubalin a kan jirgin sama mai faɗi
c) ƙarfin da aka saba da shi idan toshewar ta tsaya a kan wani jirgin sama mai karkata wanda ke samar da kusurwar 30 o zuwa ga kwance
Wanda aka sani:
Nauyin tubalin (m) = 5 kg
Saurin gudu saboda nauyi (g) = 10 m/s 2
Ana so: w, N a kan jirgin sama da N a kan titin
Magani:
a) Nauyin katako
w = mg = 5 (10) = 50 Newton
b) Ƙarfin da aka saba da shi idan tubalin yana cikin jirgin sama mai faɗi
N = w = 50 Newton
c) Ƙarfin da aka saba da shi idan toshe yana kan jirgin sama mai karkata
N = w y = w cos θ = 50 (cos 30) = 50 (½ √3) = 25√3 Newtons
2. Ana matse goge mai nauyin gram 120 a tsaye a kan allon tare da ƙarfin N15. Menene ƙarfin da ake amfani da shi a kan gogewar?
An sani:
Nauyi (m) = gram 120 = 0.12 kg
Ƙarfi (F) = 15 Newton
Ana so: Ƙarfin al'ada
Magani:
Ƙarfin da aka saba = turawa = Newtons 15
3. Ruwan sha na kwalba wanda har yanzu yana cikin akwatin ana jan shi da ƙarfin F = 200 N wanda ke samar da kusurwar 37 o tare da kwance. Sin 37 o = 0.6. Nauyin kwali da abubuwan da ke ciki shine kilogiram 20. Idan ma'aunin gogayya mai tsauri a ƙasa shine 0.5 kuma ma'aunin gogayya mai motsi a ƙasa shine 0.2, a ƙayyade ƙarfin da ake amfani da shi a kan kwali.
Wanda aka sani:
Ƙarfin ja (F) = 200 N
Zunubi 37 = 0,6
Fy = F zunubi 37 = (200) (0,6) = 120 N
Nauyin kwali (m) = 20 kg
Nauyin kwali (w) = mg = (20)(10) = 200 N
Ana nema: Ƙarfin da aka saba amfani da shi a kan kwali (N)
Magani:
Lissafa ƙarfin al'ada ta amfani da dabarar ƙarfin al'ada:
N = w – F y = 200 – 120 = Newtons 80
