In order to know how a force will affect an object, you must know the ______________

A desktop computer and monitor together draw about 0.6 A of current. They

liubo4ka [24]

Answer:

200 ohms

Explanation:

6 0

3 years ago

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A baseball has a mass of 0.15 kg and radius 3.7 cm. In a baseball game, a pitcher throws the ball with a substantial spin so tha

seraphim [82]

Answer:

Explanation:

Given

mass of baseball $m=0.15 kg$

radius of ball $r=3.7 cm$

angular speed of ball $\omega =45 rad/s$

linear speed of ball $v=42 m/s$

Transnational Kinetic Energy is given by

$K.E.=\frac{mv^2}{2}$

$K.E.=\frac{1}{2}\times 0.15\times 42^2$

$k.E.=\frac{1}{2}\times 0.15\times 1764$

$k.E.=132.3 J$

Considering the ball as solid sphere its moment of inertia is given by

$I=\frac{2}{5}mr^2=\frac{2}{5}\times 0.15\times (0.037)^2$

$I=8.21\times 10^{-5} kg-m^2$

Rotational Kinetic Energy

$=\frac{1}{2}\times I\times \omega ^2$

$=\frac{1}{2}\times 8.21\times 10^{-5}\times 45^2$

$=\frac{1}{2}\times 8.21\times 10^{-5}\times 2025$

$=0.0831 J$

6 0

3 years ago

What force will counterbalance two forces 4.0 N and 5.0 N acting perpendicular to each other?

beks73 [17]

The force that will counterbalance two forces 4.0 N and 5.0 N acting perpendicular to each other is a force of 6.4 N acting in an opposite direction to the resultant of the two forces.

<h3>Equilibrant of forces</h3>

The equilibrant of two or more forces is that single force which will have the same effect as the resultant of two or more forces but which is acting in a direction opposite to that of the resultant force.

The Resultant of the two forces 4.0 N and %.0 N acting perpendicular to each other is calculated using the formula:

R² = A² + B²

where A and B are the two forces acting perpendicular to each other.

R² = 4² + 5²

R² = 41

R = 6.4 N

Therefore, the force that will counterbalance two forces 4.0 N and 5.0 N acting perpendicular to each other is a force of 6.4 N acting in an opposite direction to the resultant of the two forces.

Learn more about resultant and equilibrant forces at: brainly.com/question/8045102

3 0

2 years ago

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Heat energy is produced when molecules move. True False

Dennis_Churaev [7]

Answer:

true

Explanation:

7 0

3 years ago

Determine the centroid of the shaded area shown in figure 2. Determine the moment of inertia about y-axis of the shaded area sho

Nady [450]

Answer:

centroid: (x, y) = (81.25 mm, 137.5 mm)
I = 8719.31 mm^2 for unit mass

Explanation:

Finding the desired measures requires we know a differential of area. That, in turn, requires we have a way to describe a differential of area. Here, we choose to use a vertical slice, which requires we know the area boundaries as a function of x.

The upper boundary is a line with a slope of 125/156.25 = 0.8, and a y-intercept of 125. That is, ...

y1 = 0.8x +125

The lower boundary is given in terms of y, but we can solve for y to find ...

100x = y^2

y2 = 10√x

Then our differential of area is ...

dA = (y1 -y2)dx

__

The centroid is found by computing the first moment about the x- and y-axes, and dividing those values by the area of the figure.

The area will be ...

$\displaystyle A=\int_0^{156.25}{dA}=\int_0^{156.25}{(y_1-y_2)}\,dx$

The y-coordinate of the centroid is ...

$\displaystyle \overline{y}=\dfrac{S_x}{A}=\dfrac{1}{A}\int_0^{156.25}{\dfrac{y_1+y_2}{2}}\,dA=\dfrac{1}{A}\int_0^{156.25}{\dfrac{y_1+y_2}{2}(y_1-y_2)}\,dx=137.5$

Similarly, the x-coordinate is ...

$\displaystyle \overline{x}=\dfrac{S_y}{A}=\dfrac{1}{A}\int_0^{156.25}{x}\,dA=\dfrac{1}{A}\int_0^{156.25}{x(y_1-y_2)}\,dx=81.25$

That is, centroid coordinates are (x, y) = (81.25, 137.5) mm.

__

The moment of inertia is the second moment of the area. If we normalize by the "mass" (area), then the integral looks a lot like the one for $\overline{x}$ , but multiplies dA by x^2 instead of x.

The attachment shows that value to be ...

I ≈ 8719.31 mm^2 (normalized by area)

The area is 16276.0416667 mm^2, if you want to "un-normalize" the moment of inertia.

7 0

3 years ago

In order to know how a force will affect an object, you must know the _______________.