3 years ago

A simple machine does work because it applies

Physics

1 answer:

tigry1 [53]3 years ago

7 0

Force
or motion im not toatally sure

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7. The energy source used to produce most of the electrical energy in the United States is ____________________.

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Fossil fuels like coal, natural gas and oil.

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Three dogs are fighting over a bone. One is pulling to the left with a force of 20N, another

Len [333]

Answer:

Net force = 21.12 N

angle for the force α = 45°

Explanation:

In this problem, we will take the left as the negative x-axis, the right as the positive x-axis, and the upward direction as the positive y-axis.

The 20 N force to the left has an x component of -20 N, and y component of 0 N

The 35 N force to the right has a x component of 35 N, and a y component of 0 N

The 15 N upwards has an x component of 0 N, and a y component of 15 N

We resolve the forces into the x and y components.

for the x component Fx

Fx = -20 + 35 + 0 = 15 N

For the y component Fy

Fy = 0 + 0 + 15 = 15 N

Net force Fn = $\sqrt{Fx^{2} + Fy^{2} }$

$Fn = \sqrt{(15)^{2} + (15^{2} ) }$

Net force Fn = 21.21 N

for the angle,

$tan\alpha = \frac{Fy}{Fx} = \frac{15}{15}$

$tan\alpha = 1$

α = $tan^{-1}$ 1

angle for force α = 45°

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3 years ago

What two fundamental units that are not vector quantities

insens350 [35]

There are seven fundamental units, out of which two examples of non-vector quantities could be:

1) meter (unit of length)
2) second (unit of time)

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Balanced or Unbalanced?

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Unbalanced because if it is pushing then stopping, that means that it is unbalanced.

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A 240-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope a

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Explanation:

Below are attachments containing the solution.

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