Answer:
Part a)
v = 16.52 m/s
Part b)
v = 7.47 m/s
Explanation:
Part a)
(a) when the large-mass object is the one moving initially
So here we can use momentum conservation as the net force on the system of two masses will be zero
so here we can say
![m_1v_{1i} + m_2v_{2i} = (m_1 + m_2)v](https://tex.z-dn.net/?f=m_1v_%7B1i%7D%20%2B%20m_2v_%7B2i%7D%20%3D%20%28m_1%20%2B%20m_2%29v)
since this is a perfect inelastic collision so after collision both balls will move together with same speed
so here we can say
![v = \frac{(m_1v_{1i} + m_2v_{2i})}{(m_1 + m_2)}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7B%28m_1v_%7B1i%7D%20%2B%20m_2v_%7B2i%7D%29%7D%7B%28m_1%20%2B%20m_2%29%7D)
![v = \frac{(8.4\times 24 + 3.8\times 0)}{3.8 + 8.4}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7B%288.4%5Ctimes%2024%20%2B%203.8%5Ctimes%200%29%7D%7B3.8%20%2B%208.4%7D)
![v = 16.52 m/s](https://tex.z-dn.net/?f=v%20%3D%2016.52%20m%2Fs)
Part b)
(b) when the small-mass object is the one moving initially
here also we can use momentum conservation as the net force on the system of two masses will be zero
so here we can say
![m_1v_{1i} + m_2v_{2i} = (m_1 + m_2)v](https://tex.z-dn.net/?f=m_1v_%7B1i%7D%20%2B%20m_2v_%7B2i%7D%20%3D%20%28m_1%20%2B%20m_2%29v)
Again this is a perfect inelastic collision so after collision both balls will move together with same speed
so here we can say
![v = \frac{(m_1v_{1i} + m_2v_{2i})}{(m_1 + m_2)}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7B%28m_1v_%7B1i%7D%20%2B%20m_2v_%7B2i%7D%29%7D%7B%28m_1%20%2B%20m_2%29%7D)
![v = \frac{(8.4\times 0 + 3.8\times 24)}{3.8 + 8.4}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7B%288.4%5Ctimes%200%20%2B%203.8%5Ctimes%2024%29%7D%7B3.8%20%2B%208.4%7D)
![v = 7.47 m/s](https://tex.z-dn.net/?f=v%20%3D%207.47%20m%2Fs)
Answer:
A bird flies 75m in 15s.Calculate its speed
Explanation:
- In chemical reactions, chemical changes occur.
- Atoms are simply rearranged and new bonds are formed.
- Chemical reactions are driven by a need for atoms to attain stability in their structure.
- In all chemical reactions, a reactant or reactants gives new product i.e new substances are formed.
- Most these reactions are not easily reversible.
- They are usually accompanied by the release of energy.
Learn more:
Chemical change brainly.com/question/9388643
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Well you could start by imagining the problem in ur head. a second is simply finish homework on time. a third is just you could study more. I mean it works for some nitnfor others. a 4th could be read a lot of physics books!