Ka hoʻohana ʻana i ka mālama ʻana i ka ikehu mechanical no ka neʻe ʻana ma ka mokulele inclined - nā pilikia a me nā hoʻonā

1. A block slides down on smooth mokulele hilig ole kū'ē. What is block’s ka wikiwiki when hits the ground. Acceleration due to gravity is 10 m/s²

ʻIke ʻia:

Kiʻekiʻe (h) = 8 m

ʻO ka wikiwiki ma muli o ka umekaumaha (g) = 10 m/s²

makemake : velocity (v)

pāʻoihana :

Initial mechanical energy (ME_o) = ikehu hiki ke hoʻopaʻa ʻia (PE)

ME_o = PE = m g h = m (10)(8) = 80 m

Final mechanical energy (ME_t) = ikehu kinetic (KE)

ME_t = KE = ½ m v²

Principle of conservation of mechanical energy states that the initial ka ikaika mechanical = the final mechanical energy :

ME_o = ME_t

80 m = ½ mv²

80 = ½ v²

160 = v²

v = √160 = √(16)(10) = 4√10 m/s

2. A 1-kg object slides down along 8 meters. Determine kinetic energy after the object moves along 5 meters… Acceleration due to gravity g = 10 m/s²

ʻIke ʻia:

Nuipaʻa (m) = 0.2 kg

d = 5 mika

Ka wikiwiki ma muli o ke koʻikoʻi (g) = 10 m/s²

makemake : kinetic energy (KE)

Lōlā:

hewa 30^o = h / d

0.5 = h / 5

h = (0.5)(5) = 2.5 meters

The change in height of the object is 2.5 meters.

The initial mechanical energy (ME_o) = the gravitational potential energy (PE)

ME_o = PE = m g h = (1)(10)(2.5) = 25 Joule

The final mechanical energy (ME_t) = kinetic energy (KE)

ME_t = I

Ke kumu o ka mālama ʻana i ka ikehu mīkini states that the initial mechanical energy = the final mechanical energy :

ME_o = ME_t

25 = KE

ʻO ka ikehu kinetic = 25 Joule.

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1. Nā pilikia hana i hana ʻia e ka ikaika a me nā hoʻonā
2. Nā pilikia a me nā hoʻonā o ka ikehu hana-kinetic
3. Nā pilikia a me nā hoʻonā i nā kumumanaʻo ikehu hana-mekanika
4. Nā pilikia ikehu hiki ke umekaumaha a me nā hoʻonā
5. ʻO ka ikehu hiki ke loaʻa i nā pilikia a me nā hoʻonā o ka pūnāwai elastic
6. Nā pilikia mana a me nā hoʻonā
7. Ka hoʻohana ʻana i ka mālama ʻana i ka ikehu mechanical no ka neʻe hāʻule manuahi
8. Ka hoʻohana ʻana i ka mālama ʻana i ka ikehu mechanical no ka neʻe ʻana i luna a i lalo i ka neʻe hāʻule manuahi
9. Ka hoʻohana ʻana i ka mālama ʻana i ka ikehu mechanical no ka neʻe ʻana ma luna o kahi ʻili kūlou
10. Ka hoʻohana ʻana i ka mālama ʻana i ka ikehu mechanical no ka neʻe ʻana ma kahi mokulele inclined
11. Ka hoʻohana ʻana i ka mālama ʻana i ka ikehu mechanical no ka neʻe ʻana o ka projectile