3 years ago

Imagine a 10kg block moving with a speed of 20m/s. calculate the kinetic energy of this block

Physics

1 answer:

avanturin [10]3 years ago

7 0

$E_{c}=\frac{mv^2}{2}=2000J$

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How many valence electrons are in an atom of fluorine

Korolek [52]

Since Fluorine has 2 electrons in the s orbitals and 5 in the p orbitals of shell number 2, there is a total of 7 valence electrons.

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3 years ago

Step 2: Apply NEwton's second law Apply ∑Fy = may , what should ay be equal to, since the block doesn't move in the y direction

andrey2020 [161]

Answer:

∑Fy = 0, because there is no movement, N = m*g*cos (omega)

Explanation:

We can solve this problem with the help of a free body diagram where we show the respective forces in each one of the axes, y & x. The free-body diagram and the equations are in the image attached.

If the product of mass by acceleration is zero, we must clear the normal force of the equation obtained. The acceleration is equal to zero because there is no movement on the Y-axis.