Mafunso atatu okhudza Impulse equation
1. Galimoto yolemera makilogalamu 250 imayenda ndi liwiro la makilomita 72 pa ola, kenako imayendetsedwa ndi mphamvu yosasintha kotero kuti mu masekondi 5 liwiro lake limafika makilomita 80 pa ola. Dziwani mphamvu ya injini kwa masekondi 5.
Zodziwika:
Kulemera kwa galimoto (m) = 250 kg
Liwiro loyambirira (v o ) = 72 km/h = 20 m/s
Liwiro lomaliza (v t ) = 80 km/h = 22 m/s
Nthawi yopuma (t) = masekondi 5
Kufunidwa: Dziwani chikhumbo (I)
yankho;
Fomula ya Impulse: Impulse = Kusintha kwa mphamvu
I = Δp
I = m (v t – vo o ) = (250)(22 – 20) = (250)(2)
I = 500 kg m/s
2. Chinthu cholemera makilogalamu 0.4 chomwe chimayamba kuyenda ndi liwiro la 20 m/s chimayimitsidwa ndi mphamvu yosalekeza ya 50 N panthawi inayake. Kodi mphamvuyo ndi yaikulu bwanji?
Zodziwika :
Kulemera (m) = 0.4 kg
Liwiro (v o ) = 20 m/s
Liwiro lomaliza (v t ) = 0 m/s
Mphamvu (F) = 50 N
Akufuna: Kusakhazikika (I)
yankho;
Fomula ya Impulse: Impulse = Kusintha kwa mphamvu
I = Δp
I = m (v t – vo o ) = (0,4)(0 – 20) = (0,4)(-20)
I = 8 kg m/s
3. Chinthu chokhala ndi kulemera m chikuyenda pa liwiro losasintha v, kotero mphamvu ya chinthucho ndi…
Anakonza
Mphamvu = kusintha kwa mphamvu. Mphamvu imasintha pamene mphamvu kapena liwiro zimasintha. Choncho ngati liwiro ndi kulemera kwake sizisintha, ndiye kuti palibe kusintha kwa mphamvu. Kuti pasakhale mphamvu.
