Mea Neʻe Pololei
ʻO ka neʻe ʻana he hanana a mākou e nānā mau nei i ke ola o kēlā me kēia lā. ʻO ka lālā o ka physics e aʻo ana i ka neʻe ʻana ua kapa ʻia ʻo mechanics. ʻO ka lālā o ka mechanics e kūkākūkā ana i ke ʻano o ka neʻe ʻana o kahi mea, me ka noʻonoʻo ʻole i ke kumu o ka neʻe ʻana, ua kapa ʻia ʻo kinematics . I ka ʻaoʻao ʻē aʻe, ʻo ka lālā o ka mechanics e kūkākūkā ana i nā kumu o ka neʻe ʻana a wehewehe i ke kumu e neʻe ai nā mea e like me kā lākou hana ʻana ua kapa ʻia ʻo dynamics. Ma kēia kumuhana, ua manaʻo ʻia kēlā me kēia mea e neʻe ana me he mea lā he ʻāpana a he kiko paha (.). Ua manaʻo ʻia nā mea e neʻe ana he mau kiko e hoʻomaʻalahi i kā mākou loiloi. E noʻonoʻo inā neʻe kahi kiko ma kahi laina pololei, a laila e hana kona alahele i laina pololei.
Ua ʻōlelo ʻia kahi mea ma ka neʻe ʻana i ka rectilinear inā pololei kona ala. Inā piʻo kona ala, ʻaʻole ka mea ma ka neʻe ʻana i ka rectilinear. ʻO ka neʻe ʻana o kahi mea, i manaʻo ʻia he ʻāpana, he ʻāpana hoʻokahi. Hiki i ka neʻe ʻana i ka ʻāpana hoʻokahi ke hana ma ka ʻaoʻao ākea (like me ke axis-x) a i ʻole ke kū pololei (like me ke axis-y).
Laʻana pilikia
1. Nā Nīnau Hoʻokolohua Lahui 2017
E nānā i ke kiʻi!
ʻO ka mamao loa i hele ʻia e kahi mea i loko o kahi manawa pōkole…
A. 0 kekona a i 10 kekona
B. 10 kekona a i 20 kekona
C. 20 kekona a i 30 kekona
D. 30 kekona a i 50 kekona
E. 50 kekona a i 70 kekona
Pahana
Haʻilula mamao:
s = vt
Ka mamao = wahi i aka ʻia.
Ka mamao loa = ka ʻāpana nui loa.
A. ½ (10-0)(20-0) = ½ (10)(20) = (5)(20) = 100
B. (20-10)(10-0) + (½)(20-10)(20-10) = (10)(10) + ½ (10)(10) = 100 + (5)(10) = 100 + 50 = 150
C. (30-20)(10-0) = (10)(10) = 100
D. (50-30)(10-0) = (20)(10) = 200
E (70-50)(10-0) + ½ (70-50)(30-10) = (20)(10) + ½ (20)(20) = 200 + (10)(20) = 200 + 200 = 400
ʻO ka pane pololei ʻo E.
2. Nā Nīnau Hoʻokolohua Lahui 2017
Hoʻolohe kahi ʻāpana e neʻe ana i luna i ka hoohalike y = 8t – t 2 , me y a me t i nā mika a me nā kekona, kēlā me kēia. ʻO ka wikiwiki o ka mea ma t = 2 kekona…
A. 2 ms -1
B. 4 ms -1
C. 8 ms -1
D. 12 ms -1
E. 16 ms -1
Pahana
y = 8t – t 2
v = 8 – 2t
ʻO ka wikiwiki o ka mea ma t = 2 kekona:
v = 8 – 2t = 8 – 2(2) = 8 – 4 = 4 m/s.
ʻO ka pane pololei ʻo B.
3. Nā Nīnau Hoʻokolohua Lahui 2017 no ke Kula Kiʻekiʻe/Kula Kiʻekiʻe ʻOihana
E nānā i ka papa ʻikepili wikiwiki no nā mea ʻekolu ma lalo nei!
Ma muli o ka papa, hiki ke hoʻoholo ʻia ʻo ka mea me ka wikiwiki nui loa ʻo ia...
A. Mea A no t 1 – t 2
B. Mea A no t 2 – t 3
C. Mea B no t 1 – t 2
D. Mea C no t 1 – t 2
E. Mea C no t 2 – t 3
Pahana
Mea A: piʻi ka wikiwiki o ka mea ma 4 m/s i kēlā me kēia 2 kekona a i ʻole 2 m/s i kēlā me kēia 1 kekona = 2 m/ s2.
Mea B: piʻi ka wikiwiki o ka mea ma 5 m/s i kēlā me kēia 2 kekona a i ʻole 2,5 m/s i kēlā me kēia 1 kekona = 2,5 m/ s2.
Mea C: emi ka wikiwiki o ka mea ma 2 m/s i kēlā me kēia 2 kekona a i ʻole 1 m/s i kēlā me kēia 1 kekona = -1 m/ s2.
ʻO C ka pane pololei.
