No sé si esto te pueda ayudar lo qué pasa es que necesitas poner fotos del trabajo porque no se entiende
Answer:
x = 1474.9 [m]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces must be equal to the product of mass by acceleration.
We must understand that when forces are applied on the body, they tend to slow the body down to stop it.
So as the body continues to move to the left, it is slowing down. Therefore we must calculate this deceleration value using Newton's second law. We must perform a sum of forces on the x-axis equal to the product of mass by acceleration. With leftward movement as negative and rightward forces as positive.
ΣF = m*a
![10 +12*sin(60)= - 6*a\\a = - 3.39[m/s^{2}]](https://tex.z-dn.net/?f=10%20%2B12%2Asin%2860%29%3D%20-%206%2Aa%5C%5Ca%20%3D%20-%203.39%5Bm%2Fs%5E%7B2%7D%5D)
Now using the following equation of kinematics, we can calculate the distance of the block, before stopping completely. The initial speed must be 100 [m/s].

where:
Vf = final velocity = 0 (the block stops)
Vo = initial velocity = 100 [m/s]
a = - 3.39 [m/s²]
x = displacement [m]
![0 = 100^{2}-2*3.39*x\\x=\frac{10000}{2*3.39}\\x=1474.9[m]](https://tex.z-dn.net/?f=0%20%3D%20100%5E%7B2%7D-2%2A3.39%2Ax%5C%5Cx%3D%5Cfrac%7B10000%7D%7B2%2A3.39%7D%5C%5Cx%3D1474.9%5Bm%5D)
I didnt want to type it all so here is the link that tells you all you need to answer that question
https://kids.kiddle.co/Electron_cloud
Answer:
a. W = 2.17 x 10 ⁴ J
b. ΔU = - 5.03 x 10⁴ J
c. Q = 2.86 x 10 ⁻³ J
Explanation:
a.
The student work does 2.17 x 10⁴ J
So W = 2.17 x 10 ⁴ J
b.
The internal energy decreases 5.03 x 10⁴ J
ΔU = U₁ - U₂
ΔU = 0 - 5.03 x 10⁴ J = - 5.03 x 10⁴ J
c.
The formula heat can use:
Q = W + ΔU
Q = 2.17 x 10⁴ J + ( - 5.03 x 10⁴ J )
Q = 2.86 x 10 ⁻³ J