When a hypothesis is confirmed true by evidence from many experiments, it becomes widely accepted by scientists, and it gets a new name: 'Theory' .
I think its gonna be 106
154-48=106
ie;mass number - atomic number = neutron number
Answer:572.02 N
Explanation:
Given
mass of sofa m =63 kg
inclination![=30 ^{\circ}](https://tex.z-dn.net/?f=%3D30%20%5E%7B%5Ccirc%7D)
![\mu _k=0.41](https://tex.z-dn.net/?f=%5Cmu%20_k%3D0.41)
acceleration ![a=0.7 m/s^2](https://tex.z-dn.net/?f=a%3D0.7%20m%2Fs%5E2)
Let T be the tension in the string
![T-mg\sin \theta -f_r=ma](https://tex.z-dn.net/?f=T-mg%5Csin%20%5Ctheta%20-f_r%3Dma)
![f_r=\mu _kmg\cos \theta](https://tex.z-dn.net/?f=f_r%3D%5Cmu%20_kmg%5Ccos%20%5Ctheta%20)
![f_r=0.41\times 63\times 9.8\times \cos (30)](https://tex.z-dn.net/?f=f_r%3D0.41%5Ctimes%2063%5Ctimes%209.8%5Ctimes%20%5Ccos%20%2830%29)
![f_r=219.22 N](https://tex.z-dn.net/?f=f_r%3D219.22%20N)
![T-63\times 9.8\times \sin (30)-219.22=63\times 0.7](https://tex.z-dn.net/?f=T-63%5Ctimes%209.8%5Ctimes%20%5Csin%20%2830%29-219.22%3D63%5Ctimes%200.7)
![T-308.7-219.22=44.1](https://tex.z-dn.net/?f=T-308.7-219.22%3D44.1)
![T=527.92+44.1=572.02 N](https://tex.z-dn.net/?f=T%3D527.92%2B44.1%3D572.02%20N)
The acceleration of the bike is ![3.5 m/s^2](https://tex.z-dn.net/?f=3.5%20m%2Fs%5E2)
Explanation:
We can solve this problem by using Newton's second law of motion, which states that:
![F=ma](https://tex.z-dn.net/?f=F%3Dma)
where
F is the net force on an object
m is the mass of the object
a is its acceleration
For the bike in this problem, we have
F = 175 N is the net force
m = 50 kg is the mass
And solving for a, we find the acceleration:
![a=\frac{F}{m}=\frac{175}{50}=3.5 m/s^2](https://tex.z-dn.net/?f=a%3D%5Cfrac%7BF%7D%7Bm%7D%3D%5Cfrac%7B175%7D%7B50%7D%3D3.5%20m%2Fs%5E2)
Learn more about Newton's second law and acceleration:
brainly.com/question/3820012
#LearnwithBrainly
Answer:
The answer is number 2 :)