Chitsanzo cha mafunso okhudza mphamvu ya kinetic

Zitsanzo zitatu za mafunso okhudza mphamvu ya kinetic

1. Zinthu A ndi B zili ndi kulemera kofanana ndipo chilichonse chimayenda mofulumira monga momwe chithunzi chili pansipa chikusonyezera:
Chiŵerengero cha mphamvu ya kinetic pakati pa chinthu A ndi chinthu B ndi...

A. 1: 2
B. 1: 4
C. 2: 1
D. 4: 1

Zokambirana

Zinthu A ndi B zili ndi kulemera komweko. Kulemera kwa zinthu A ndi B kumaimiridwa ndi m.
Fomula ya mphamvu ya kinetic:
EK = ½ mv²
Kufotokozera: EK = mphamvu ya kinetic, m = kulemera, v = liwiro
Mphamvu ya kinetic ya chinthu A :
EK_A = ½ mv² = ½ m 2² = ½ m (4) = 2 m
Mphamvu ya kinetic ya chinthu B :
EK_B = ½ mv² = ½ m 4² = ½ m (16) = 8 m
Kuyerekeza mphamvu ya kinetic ya chinthu A ndi chinthu B:
EK_A : EK_B
2 m : 8 m
2: 8
1: 4
Yankho lolondola ndi B.

2. Yang'anani chithunzi cha basi ndi galimoto ikuyenda pansipa!
Kulemera kwa basi ndi 10.000 kg ndipo kulemera kwa galimoto ndi 500 kg, kotero chiŵerengero cha mphamvu ya kinetic ya basi ndi mphamvu ya kinetic ya galimoto ndi…

A. 2: 1
B. 4: 1
C. 5: 1
D. 20: 1

Zokambirana
Mphamvu ya kinetic ya basi:
EK = ½ mv² = ½ (10.000)(10)² = (5000)(100) = 500.000
Mphamvu ya kinetic ya galimoto:
EK = ½ mv² = ½ (500)(20)² = (250)(400) = 100.000
Kuyerekeza mphamvu ya kinetic ya basi ndi mphamvu ya kinetic ya galimoto ndi:
500.000: 100.000
5: 1
Yankho lolondola ndi C.

3. Yang'anani chithunzicho!
Galimoto imayenda pa liwiro losiyana kuchokera ku A kupita ku B. Chiŵerengero cha mphamvu ya kinetic yomwe galimoto ili nayo pa mfundo A ndi pa mfundo B ndi…
A. 1: 2
B. 1: 4
C. 2: 1
D. 4: 1
Zokambirana
Mphamvu ya kinetic ya galimoto pa mfundo A:
EK = ½ mv² = ½ m (10)² = ½ m (100) = 50 m
Mphamvu ya kinetic ya galimoto pa mfundo B:
EK = ½ mv² = ½ m (20)² = ½ m (400) = 200 m
Kuyerekeza kwa mphamvu ya kinetic ya galimoto pa mfundo A ndi pa mfundo B ndi:
50 m : 200 m
50: 200
1: 4
Yankho lolondola ndi B.

Gwero la funso:

Mafunso a Mayeso a Sayansi ya Sukulu ya Sekondale/Chisilamu cha Sukulu ya Sekondale