Answer:
![\Delta P = -1.14 \hat i + 0.33\hat j](https://tex.z-dn.net/?f=%5CDelta%20P%20%3D%20-1.14%20%5Chat%20i%20%2B%200.33%5Chat%20j)
Part b)
![v_f = 0.03 \hat i + 1.79 \hat j](https://tex.z-dn.net/?f=v_f%20%3D%200.03%20%5Chat%20i%20%2B%201.79%20%5Chat%20j)
Explanation:
Part a)
As we know that impulse is due to the force applied for small time due to which momentum is changed
so we will have
![\Delta P = F\Delta t](https://tex.z-dn.net/?f=%5CDelta%20P%20%3D%20F%5CDelta%20t)
so we will have
![F = -380 \hat i + 110 \hat j](https://tex.z-dn.net/?f=F%20%3D%20-380%20%5Chat%20i%20%2B%20110%20%5Chat%20j)
also we know that
![\Delta t = 3 ms](https://tex.z-dn.net/?f=%5CDelta%20t%20%3D%203%20ms)
now impulse is given as
![\Delta P = (-380\hat i + 110 \hat j)(3 \times 10^{-3})](https://tex.z-dn.net/?f=%5CDelta%20P%20%3D%20%28-380%5Chat%20i%20%2B%20110%20%5Chat%20j%29%283%20%5Ctimes%2010%5E%7B-3%7D%29)
![\Delta P = -1.14 \hat i + 0.33\hat j](https://tex.z-dn.net/?f=%5CDelta%20P%20%3D%20-1.14%20%5Chat%20i%20%2B%200.33%5Chat%20j)
Part b)
As we know that
![\Delta P = m(v_f - v_i)](https://tex.z-dn.net/?f=%5CDelta%20P%20%3D%20m%28v_f%20-%20v_i%29)
![(-1.14 \hat i + 0.33 \hat j) = (\frac{0.560}{9.81})(v_f - (20\hat i - 4\hat j))](https://tex.z-dn.net/?f=%28-1.14%20%5Chat%20i%20%2B%200.33%20%5Chat%20j%29%20%3D%20%28%5Cfrac%7B0.560%7D%7B9.81%7D%29%28v_f%20-%20%2820%5Chat%20i%20-%204%5Chat%20j%29%29)
![-19.97 \hat i + 5.79\hat i + 20 \hat i - 4\hat j = v_f](https://tex.z-dn.net/?f=-19.97%20%5Chat%20i%20%2B%205.79%5Chat%20i%20%2B%2020%20%5Chat%20i%20-%204%5Chat%20j%20%3D%20v_f)
![v_f = 0.03 \hat i + 1.79 \hat j](https://tex.z-dn.net/?f=v_f%20%3D%200.03%20%5Chat%20i%20%2B%201.79%20%5Chat%20j)
Answer:
B) Yes, but only those electrons with energy greater than the potential difference established between the grid and the collector will reach the collector.
Explanation:
In the case when the collector would held at a negative voltage i.e. small with regard to grid So yes the accelerated electrons would be reach to the collecting plate as the kinetic energy would be more than the potential energy that because of negative potential
so according to the given situation, the option b is correct
And, the rest of the options are wrong
I believe the answer is transmission
The answer is B- Perfect Cosmological Principle
Sorry it took people so long to anser:)
Answer:
The work done against friction is the work done on an object that overcomes this frictional force allowing the object to move - it doesn't include any extra work used to accelerate an object for example - only the work used to beat the frictional force.
Explanation: