Answer: The truck's velocity after braking = 17m/s.
Explanation:
Given: Initial velocity(i) = 25 m/s
Time(t) = 4s
Acceleration(a) = -2 m/s ²
We use the following formula to compute final velocity (v):
![v= i+at\\\\\Rightarrow\ v=25+(-2)(4\ \ \ [\text{Substitute all values}]\\\\\Rightarrow\ v=25-8\\\\\Rightarrow\ v=17\ m/s](https://tex.z-dn.net/?f=v%3D%20i%2Bat%5C%5C%5C%5C%5CRightarrow%5C%20v%3D25%2B%28-2%29%284%5C%20%5C%20%5C%20%5B%5Ctext%7BSubstitute%20all%20values%7D%5D%5C%5C%5C%5C%5CRightarrow%5C%20v%3D25-8%5C%5C%5C%5C%5CRightarrow%5C%20v%3D17%5C%20m%2Fs)
Hence, the truck's velocity after braking = 17m/s.
The carbon cycle refers to the processes by which carbon in the biosphere is recycled. Photosynthesis sucks carbon dioxide out of the atmosphere, while cellular respiration releases it into the environment. Photosynthesis is the process by which solar energy reaches a plant and is converted into glucose.
<u>How photosynthesis and cellular respiration are similar:</u>
<em>Photosynthesis</em> is a method by which plants and other organisms transform light energy into chemical energy, which is then released to fuel the organism's metabolic activities through<em> </em><em>cellular respiration.</em>
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Answer:
Explanation:
Before it hits the ground:
The initial potential energy = the final potential energy + the kinetic energy
mgH = mgh + 1/2 mv²
gH = gh + 1/2 v²
v = √(2g (H - h))
v = √(2 * 9.81 m/s² * (0.42 m - 0.21 m))
v ≈ 2.0 m/s
When it hits the ground:
Initial potential energy = final kinetic energy
mgH = 1/2 mv²
v = √(2gH)
v = √(2 * 9.81 m/s² * 0.42 m)
v ≈ 2.9 m/s
Using a kinematic equation to check our answer:
v² = v₀² + 2a(x - x₀)
v² = (0 m/s)² + 2(9.8 m/s²)(0.42 m)
v ≈ 2.9 m/s
Answer:
hola me llamo bruno y tu?
Explanation:
pero yo soy de mexico
