De thi tuyen sinh lop 10 vat ly chuyen

DAI HOC TAN TAO TRVONG THPT NANG ICEHEU BE CHINH mtrc KI THI TUYEN SINN LOP 10 NAM HOC 2015-2016 MON THI: VAT Li (CHUYEN) Ngay thi: 05/6/2015 TWA gian lam bai: 150 phut Cau 1: (1,0 diem) M6t nguoi, di xe may dr A den B r6i trey ve A Khi di tir A den B, tren /lira quang dating dau di voi van toe khong doi 40 km/h; trn /lira quang duOng lai di vai van t6c kh8ng d6i 60 km/h Khi den B, nguei ay lap tirc quay ye A (136 qua thOi gian quay dau xe) Trong nira theyi gian di tir B ye A, ngtroi di voi van toe khong doi 50 km/h; nira thai gian lai di voi van Vic khong doi 30 km/h Tinh van toe trung binh cua ngtrefi ca qua trinh chuyen d6ng Cau 2: (1,5 diem) Co ba binh each nhiet dung ntroc, lacing nubs va nhiet d6 ban dau cua moi binh Ian loot la: mi, t1; m2, t2 va m3, t3 Ta d6 nu6c binh thir nhk va binh th* hai vao binh thir ba thi nhiet d6 cua mac có can bang nhiet la 45°C Biet m1 = 2m2 = 4m3, t1 = 2t2 = 4t3 Tinh nhiet d6 t1, t2 va t3 (bey qua su mat mat nhiet moi trung xung quanh hap thu) Cau 3: (1,0 dam) DUng mot mat phang nghieng co chieu dai 10 m de dua mot vat có luting 200 kg len cao m bang mot lac kdo 1000 N a) Tinh hieu suat eta mat phang nghieng b) Tinh lure can tac dung len vat trueng hop Cau 4: (2,0 dam) II& MN la true chinh cua than kinh, AB vat sang, A'B' la anh dm AB qua than kinh a) Bang each ye duong truyen cua cac tia sang, xac dinh quang tam va cac tieu diem dm thau kinh b) Cho AB = cm, A'B' = cm, AA' 16 cm Xac dinh khoang each dr vat M A N AB den than kinh va tieu cu cua thau kinh? Cau 5: (1,5 diem) M6t ding suat dien 50 kW duce truyen dr may phat dien xoay chieu co hieu dien the on dinh kV den not tieu thu bang day tai có dien tr& tong cong la S2 Khi mac true tiep day tai vao hai cac dm may phat dien thi hieu dien the & nth tieu thy bang bao nhieu? Tinh cong suat hao phi trill day tai va hieu suat tai dien Cau 6: (2,0 diem) Cho mach dien nhu hinh R C ye Cac ampe ke A1, A2, A3, A4 co ding dien trey Ra Biet ampe ke Al chi 1,5 A, M ampe ke A2 chi A a) Tim so chi dm cac ampe ke A3, A4 va eating d6 dong dien qua dien trey R b) Biet R =1,5 S2, tinh dien trey Ra cua cac ampe ke va hieu dien the U can 7: (1,0 dam) 1-la'y neu phucmg an xac dinh luting rieng cua drily ngan? Cho cac dung cu gOm: - Lo thiiy tinh rOng 41:1 kin Nu& co kh6i luting rieng D - Thity ngan dung de xac dinh khoi luting rieng - Can d6ng ho c45 dO chinh xac cao, CO giai han va chia nho nhat phii hop - Het Ho va ten thi sinh• So bdo danh