Txheeb xyuas qhov ceev pib rau hauv cov khoom kab rov tav thiab ntsug ntawm kev txav mus los ntawm projectile

Tau daws cov teeb meem hauv kev txav mus los ntawm projectile - txiav txim siab qhov ceev pib rau hauv cov khoom kab rov tav thiab ntsug

1. Ib lub pob ncaws pob uas raug ncaws tawm hauv av ntawm lub kaum sab xis θ = 60^o nrog qhov ceev ntawm 10 m/s. Xam cov khoom pib ntawm qhov ceev!
Paub:
Lub kaum sab xis (θ) = 60^o
Qhov ceev pib (v_o) = 10 m/s
Xav tau: v_ox thiab v_oy
Tshuaj:
Txiav txim siab qhov ceev pib rau hauv x Cheebtsam (kab rov tav) thiab y Cheebtsam (ntsug).
sin θ = v_oy / ua v_o —–> v_oy = v_o sib θ
cos θ = v_ox / ua v_o —–> v_ox = v_o cos θ

x Cheebtsam (kab rov tav):
v_ox = v_o cos θ = (10 m/s)(cos 60^o) = (10 m/s)(0.5) = 5 m/s

y Cheebtsam (ntsug):
v_oy = v_o sin θ = (10 m/s)(sin 60^o) = (10 m/s)(0.5√3) = 5√3 m/s

2. Ib yam khoom tawm hauv av ntawm lub kaum sab xis θ = 30^o nrog y feem ntawm qhov ceev 10 m/s. Xam qhov ceev pib!
Paub:
Lub kaum sab xis (θ) = 30^o
y Cheebtsam (v_oy) = 10 m/s
Xav tau: Qhov ceev pib (v_o)
Tshuaj:
v_oy = v_o sib θ
10 = (v)_o)(kev txhaum 30^o)
10 = (v)_o)(0.5)
v_o = 10/0.5
v_o = 20 m/s

3. Qhov feem ntawm kab rov tav ntawm qhov ceev pib yog 30 m/s thiab qhov feem ntsug ntawm qhov ceev pib yog 40 m/s. Xam qhov ceev pib.
Paub:
Kab rov tav ntawm qhov ceev pib (v)_ox) = 30 m/s
Feem ntsug ntawm qhov ceev pib (v)_oy) = 40 m/s
Xav tau: Qhov ceev pib (v_o)
Tshuaj:
v_o² = v_ox² +v_oy² = 30² + 40² Luas = 900 + 1600 = 2500
v_o = √2500
v_o = 50 m/s

4. Ib lub pob me me raug tso tawm kab rov tav nrog qhov ceev pib v_o = 6m/s. Xam cov x Cheebtsam thiab y Cheebtsam ntawm qhov ceev pib.
Paub:
Qhov ceev pib (v_o) = 6 m/s
Xav tau: lus thiab v_oy
Tshuaj:
Lub pob txav mus rau kab rov tav kom qhov sib txuas ntawm qhov ceev (v)_ox) = qhov ceev pib (v_o) = 6 m/s. Feem ntsug ntawm qhov ceev (v)_oy) = 0.

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1. Txheeb xyuas qhov ceev pib rau hauv cov khoom kab rov tav thiab ntsug
2. Txheeb xyuas qhov kev hloov pauv kab rov tav
3. Txheeb xyuas qhov siab tshaj plaws
4. Txheeb xyuas lub sijhawm sib nrug
5. Txheeb xyuas qhov chaw ntawm cov khoom
6. Txheeb xyuas qhov ceev kawg