7-sinf Fizika IV chorak uchun mavzulashtirilgan testlar 1-Mavzu: Reaktiv harakat. Raketaning tuzilishi va ishlashi

3-Mavzu: 4-loboratoriya ishi: Jismni ko`tarishda va shu masofaga gorizontal ko`chirishda bajarilgan ishni hisoblash.
1.Brusokning og`irligi nima yordamida o`lchanadi?
a) gigrometr +b) dinomometr c) metr d ) chizg`ich
2. Brusokni yuqoriga tekis harakatlantirganda uning bajargan ishini qaysi formula yordamida aniqlaymiz?
a) A= mg b) A= µmg +c)A=F_og`*h d)A=F*S
3. Ushbu laboratoriya ishida quyidagilardan qaysi jihozlar kerak bo`ladi?
1. chizg`ich 2. Po`lat sharcha 3. O`quv dinamometri. 4. 100g massali yuk 5.sekundomer 6.metal nov 7. Brusok.
+a) 1,3, 4,7 b)1,3,4,5 c) 2,3,6,7 d) 2,4,6,7