Answer:
false, i just took the test.
Explanation:
More massive attacking objects speed slows down and it transfer its some kinetic energy to less massive target objects whereas less massive target objects starts its motion
Answer:
The net magnetic field ta the center of square is
.
Explanation:
Current, I = 12 A , side ,a = 10 cm = 0.1 m
Let the magnetic field due to the one side is B.
The magnetic field is given by
![B = \frac{\mu o}{4\pi}\times \frac{I}{r}\times \left (Sin A +Sin B \right )\\\\B = 10^{-7}\times \frac{12}{0.05}\times \left ( sin 45 + sin 45 \right )\\\\B = 3.4\times 10^{-5} T](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B%5Cmu%20o%7D%7B4%5Cpi%7D%5Ctimes%20%5Cfrac%7BI%7D%7Br%7D%5Ctimes%20%5Cleft%20%28Sin%20A%20%2BSin%20B%20%20%5Cright%20%29%5C%5C%5C%5CB%20%3D%2010%5E%7B-7%7D%5Ctimes%20%5Cfrac%7B12%7D%7B0.05%7D%5Ctimes%20%5Cleft%20%28%20sin%2045%20%2B%20%20sin%2045%20%20%5Cright%20%29%5C%5C%5C%5CB%20%3D%203.4%5Ctimes%2010%5E%7B-5%7D%20T)
Net magnetic field at the center of the square is
B' = 4 B
![B'= 4\times 3.4\times 10^{-5}\\\\B' = 1.36\times10^{-4} T](https://tex.z-dn.net/?f=B%27%3D%204%5Ctimes%203.4%5Ctimes%2010%5E%7B-5%7D%5C%5C%5C%5CB%27%20%3D%201.36%5Ctimes10%5E%7B-4%7D%20T)
Answer:
The distance traveled by car before stopping is ![90\, ft](https://tex.z-dn.net/?f=90%5C%2C%20ft)
Explanation:
Given
Initial speed of car ![u=30\, \frac{ft}{sec}](https://tex.z-dn.net/?f=u%3D30%5C%2C%20%5Cfrac%7Bft%7D%7Bsec%7D)
Final speed of the car ![v=0\, \frac{ft}{sec}](https://tex.z-dn.net/?f=v%3D0%5C%2C%20%5Cfrac%7Bft%7D%7Bsec%7D)
Acceleration of the car ![a=-5\, \frac{ft}{sec^{2}}](https://tex.z-dn.net/?f=a%3D-5%5C%2C%20%5Cfrac%7Bft%7D%7Bsec%5E%7B2%7D%7D)
Let distance traveled before stopping be s
Using equation of motion
![v^{2}=u^{2}+2as](https://tex.z-dn.net/?f=v%5E%7B2%7D%3Du%5E%7B2%7D%2B2as)
=>![0^{2}=30^{2}+2\times (-5)\times s](https://tex.z-dn.net/?f=0%5E%7B2%7D%3D30%5E%7B2%7D%2B2%5Ctimes%20%28-5%29%5Ctimes%20s)
=>![s=90\, ft](https://tex.z-dn.net/?f=s%3D90%5C%2C%20ft)
Thus the distance traveled by car before stopping is ![90\, ft](https://tex.z-dn.net/?f=90%5C%2C%20ft)