Answer:
1.56 m/s
Explanation:
For East direction, the 6 blocks is equivalent to 6*100=600 m
For West direction, 8 blocks is equivalent to 8*100=800 m
Speed is given by s=d/t where s is speed, d is distance covered and t is time taken
Total distance is 600+800=1400m
Time taken is 15 mins, converted to seconds will be 15*60=900 s
Speed, s=1400/900=1.5555555555555 m/s rounded off as 1.56 m/s
Answer with Explanation:
We are given that
Mass of adult,M=75 kg
Length of board=l=9 m
Mass of child=m=25 kg
a.Let pivot placed at point O so that the board is balanced ignoring the board's mass
Moment about the point O
![75x=25(9-x)](https://tex.z-dn.net/?f=75x%3D25%289-x%29)
![75x=225-25x](https://tex.z-dn.net/?f=75x%3D225-25x)
![75x+25x=225](https://tex.z-dn.net/?f=75x%2B25x%3D225)
![100x=225](https://tex.z-dn.net/?f=100x%3D225)
![x=\frac{225}{100}=2.25 m](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B225%7D%7B100%7D%3D2.25%20m)
Hence, the pivot placed at 2.25 m from the adult.
b.Mass of board=m''=15 kg
Center of board=![\frac{9}{2}=4.5 m](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B2%7D%3D4.5%20m)
Moment about point O
![75x=15(4.5-x)+25(4.5+(4.5-x))](https://tex.z-dn.net/?f=75x%3D15%284.5-x%29%2B25%284.5%2B%284.5-x%29%29)
![75x=67.5-15x+225-25x](https://tex.z-dn.net/?f=75x%3D67.5-15x%2B225-25x)
![75x+25x+15=67.5+225](https://tex.z-dn.net/?f=75x%2B25x%2B15%3D67.5%2B225)
![115x=292.5](https://tex.z-dn.net/?f=115x%3D292.5)
![x=\frac{292.5}{115}=2.5 m](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B292.5%7D%7B115%7D%3D2.5%20m)
Hence, the pivot point is 2.5 m from the adult.
Answer:
C
Explanation:
BECAUSE ITS GOING ON AND ON IF ITS NOT CORRECT I WILL VOTE YOU BRAINLEST ON MY QUESTION
Answer:
The Constant is the amount of water and the light intensity.
Explanation:
Answer:
d) The screen is in a short distance from the hole