Maikling Buod
Ang video ay nagpapaliwanag ng Ikalawang Batas ng Paggalaw ni Newton, na kilala rin bilang batas ng acceleration. Ipinapaliwanag nito na ang acceleration ng isang bagay ay direktang proporsyonal sa net force na gumagana dito at baligtad na proporsyonal sa masa nito. Tinalakay din ang formula para sa force (F = ma), acceleration, at mass, pati na rin ang konsepto ng weight bilang force dahil sa gravity. Nagbigay din ito ng mga halimbawa kung paano kalkulahin ang force, acceleration, at mass gamit ang batas na ito.
- Ang acceleration ay direktang proporsyonal sa force at baligtad na proporsyonal sa masa.
- Ang force ay sinusukat sa Newtons (N), kung saan ang 1 N = 1 kg*m/s².
- Ang weight ay ang force dahil sa gravity (W = mg).
Ang video ay tungkol sa Ikalawang Batas ng Paggalaw ni Newton, na kilala rin bilang batas ng acceleration. Bago magpatuloy, inirerekomenda na panoorin muna ang Part 1 ng serye upang maunawaan ang mga pangunahing konsepto ng force at motion.
Ayon sa batas ng acceleration, ang acceleration ng isang bagay ay direktang proporsyonal sa net force na gumagana dito at baligtad na proporsyonal sa masa nito. Ibig sabihin, mas malaki ang masa ng isang bagay, mas malaking force ang kailangan upang mapabilis ito. Ang batas na ito ay maaaring ibuod sa equation na F = ma, kung saan ang F ay force, m ay mass, at a ay acceleration. Maaari ring gamitin ang formula upang kalkulahin ang acceleration (a = F/m) at mass (m = F/a).
Ang yunit ng pagsukat para sa force ay Newton (N), kung saan ang 1 Newton ay ang force na kinakailangan upang mapabilis ang isang 1-kilogram na masa sa rate na 1 metro bawat segundo squared (1 kg*m/s²). Ang weight ay ang force dahil sa gravity, at kinakalkula ito gamit ang formula na W = mg, kung saan ang g ay ang acceleration dahil sa gravity, na may constant na 9.8 metro bawat segundo squared.
Ang unang halimbawa ng problema ay nagpapakita kung paano kalkulahin ang force na kinakailangan para sa isang rocket upang makamit ang isang acceleration na 70 metro bawat segundo squared, kung ang masa ng rocket ay 45,000 kilograms. Gamit ang formula na F = ma, ang net force na kinakailangan ay 3,150,000 Newtons.
Ipinapakita ng pangalawang halimbawa kung paano kalkulahin ang acceleration ng isang 0.60-kilogram na bola na tinamaan ng force na 12 Newtons. Sa pamamagitan ng pag-transmute ng formula sa a = F/m, ang acceleration ay 20 metro bawat segundo squared.
Ang pangatlong halimbawa ay nagpapakita kung paano kalkulahin ang masa ng isang encyclopedia kung ang force na gumagana dito ay 15 Newtons at ang acceleration ay 5 metro bawat segundo squared. Sa pamamagitan ng pag-transmute ng formula sa m = F/a, ang masa ng encyclopedia ay 3 kilograms.
Sa buod, ang Ikalawang Batas ng Paggalaw ni Newton ay nagpapaliwanag na kapag ang isang force ay gumagana sa isang bagay, ito ay magpapabilis sa direksyon ng force. Ang acceleration ay direktang proporsyonal sa force at baligtad na proporsyonal sa masa ng bagay.
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0:00 [Music] hi there in this video we are going to discuss newton's second law of motion the law of acceleration if you still haven't watched part 1 pause this video and click the link below to watch it before this one since we already know the fundamental concepts of force and motion from part 1 we will now continue learning about the second law of motion newton's law of acceleration states that the acceleration of an object is directly proportional to the net force on it and inversely proportional to its mass
0:47 this means that the force acting on an object is equal to the mass of that object times its acceleration put simply the greater the mass of the object being accelerated to greater the amount of force needed to accelerate the object to help us understand this better let's take this example the boy at the front has to apply less force to accelerate the bicycle since he has less mass the man at the back needs to apply more force to exhilarate the bicycle because of the added mass of the woman we can summarize this law in this equation force is equal to mass times
1:33 acceleration where f is force m is mass and a is acceleration likewise the exhilaration of an object is equal to the sum of the forces acting on it divided by the mass of the object and the mass of an object is equal to the sum of the forces acting on it divided by the acceleration of an object the unit of measurement for force is newton it is the amount of force that will accelerate a one kilogram mass at the rate of one meter per second squared since force is equals to mass times acceleration therefore one newton is equal to one
2:19 kilogram meter per second squared another concept we need to understand is weight weight is the force due to gravity therefore weight is equal to mass times acceleration due to gravity where acceleration due to gravity has a constant of 9.8 meters per second squared here is a sample problem if we're trying to compute force engineers of the johnson space center must determine the net force needed for a rocket to achieve an exhilaration of 70 meters per second squared if the mass of the rocket is 45 000 kilograms how much net force must the rocket develop so we have the formula
3:06 force equals to mass times acceleration the given mass is 45 000 kilograms multiplied to the required acceleration of 70 meters per second squared we now get the value of 3 million 150 000 kilogram meter per second squared which is also equivalent to 3 million 150 000 newtons let's have another example this time we're going to compute for the exhilaration of a 0.60 kilogram ball of mass hit with a force of 12 newtons again we have the formula force equals to mass times acceleration to look for the acceleration transmute
3:52 this formula by dividing force to the mass we now have the new formula acceleration equals force divided by mass so divide the given force of 12 newtons by the mass of 0.60 kilograms note that a neutron is equivalent to kilogram meter per second squared we can cancel out the unit kilogram which leaves us to the unit meters per second squared 12 meters per second squared divided by 0.60 equals 20 meters per second squared let's have one last example this time we are asked to look for the mass of an encyclopedia
4:38 again we have the formula force equals to mass times acceleration to look for the mass transmute this formula by dividing force to the acceleration we now have the new formula mass equals force divided by acceleration we divide a force of 15 newtons by the acceleration of 5 meters per second squared since newton is equivalent to kilogram meter per second squared we can cancel out the unit meter per second squared which leaves us with the unit kilogram 15 kilograms divided by 5 equals 3 kilograms which is the mass of the encyclopedia in summary when a force acts on an
5:24 object it will accelerate in the direction of the force with an amount directly proportional to the force exerted while inversely proportional to the mass of the object this relationship can be explained by newton's second law of motion or the law of exhilaration that's all for now see you on our next video and don't forget to keep your minds busy thanks for watching our video if you want to see more content from the learning bees please hit the subscribe button see you later
