Answer:
![a = 10](https://tex.z-dn.net/?f=a%20%3D%2010)
Step-by-step explanation:
Given
![Initial\ Velocity\ (u) = 20m/s](https://tex.z-dn.net/?f=Initial%5C%20Velocity%5C%20%28u%29%20%3D%2020m%2Fs)
![Final\ Velocity\ (v) = 60m/s](https://tex.z-dn.net/?f=Final%5C%20Velocity%5C%20%28v%29%20%3D%2060m%2Fs)
![Time = 4s](https://tex.z-dn.net/?f=Time%20%3D%204s)
Required
Determine the acceleration
This question will be answered using the first equation of motion.
![v = u + at](https://tex.z-dn.net/?f=v%20%3D%20u%20%2B%20at)
Substitute values for v, u and t
![60 = 20 + 4 * a](https://tex.z-dn.net/?f=60%20%3D%2020%20%2B%204%20%2A%20a)
![60 = 20 + 4 a](https://tex.z-dn.net/?f=60%20%3D%2020%20%2B%204%20a)
Subtract 20 from both sides
![60 - 20= 20 -20 + 4 a](https://tex.z-dn.net/?f=60%20-%2020%3D%2020%20-20%20%2B%204%20a)
![40= 4 a](https://tex.z-dn.net/?f=40%3D%20%204%20a)
Divide both sides by 4
![10 = a](https://tex.z-dn.net/?f=10%20%3D%20a)
![a = 10](https://tex.z-dn.net/?f=a%20%3D%2010)
<em>Hence, the acceleration is 10m/s/s</em>
Answer:
y=6
Step-by-step explanation:
divide the total area by 5 to get the area of the square
180/5= 36 cm²
the area of a square is y²
so y²=36⇒ y= 6
Answer:
Step-by-step explanation:
Get the perimeter of the each shape and add it all up to get the total fencing material required.
2 square flower beds = 2 x 4a = 8a
1 rectangular play ground = 2l + 2w
total fencing material = 8a + 2l + 2w
F(x) = 4 [cos (x)]^2 - 3 = 0
4[cos(x)]^2 = 3
cos(x) = √3 / 2
That happens in the first and fourth quadrants, for the angles 30 degrees and 330 degrees.
Answer: x = 30 degrees and x = 330 degrees