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AleksAgata [21]
3 years ago
9

The coefficient of kinetic friction between a 780.-newton crate and a level warehouse floor is 0.200. calculate the magnitude of

the horizontal force required to move the crate across the floor at constant speed.

Physics
1 answer:
ira [324]3 years ago
5 0
You must first make a free body diagram of the block to place all the forces that act on the block there. You will have four forces. The normal force, the weight, the horizontal force in x (which is what they ask to calculate) and the friction force. Then you raise the equations and you clear the values. I attach the solution.

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Jeremy is walking through the woods, marking diseased trees for removal. He walks for 2.44 km, at a heading of 13.9° west of nor
Ludmilka [50]

We conclude that Jeremy walked 2.37km North and 0.59 km West.

<h3>How to get the North and West components?</h3>

We can assume that the distance that he walked is the hypotenuse of a right triangle, like the one you can see in the image below.

There, you can see that the adjacent cathetus would be the displacement in the North direction, while the opposite cathetus would be the displacement in the West direction.

Then we can use the relations.

  • Sin(θ) = (opposite cathetus)/(hypotenuse)
  • Cos(θ)  = (adacent cathetus)/(hypotenuse).

With θ = 13.9° and hypotenuse = 2.44km

Solving these two we will get:

sin(13.9°) = Y/2.44km

sin(13.9°)*2.44km = Y = 0.59 km

cos(13.9°) = X/2.44km

cos(13.9°)*2.44km = X = 2.37km

So we can conclude that he walked 2.37km North and 0.59 km West.

If you want to learn more about right triangles, you can read:

brainly.com/question/2217700

7 0
3 years ago
If you exert a force of 10.0 N to lift a box a distance of 0.75 m, how much work do you do?
Bas_tet [7]

Answer:

<h2>7.5 J</h2>

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 10 × 0.75

We have the final answer as

<h3>7.5 J</h3>

Hope this helps you

7 0
3 years ago
The resistor potential is constant and the inductor emf increases. The resistor potential is constant and the inductor emf decre
maks197457 [2]

The question is incomplete, the complete question is

When an RL circuit is connected to a battery, what happens to the potential difference across the resistor and the emf across the inductor?

The resistor potential is constant and the inductor emf increases.

The resistor potential is constant and the inductor emf decreases.

The resistor potential is constant and the inductor emf is constant.

The resistor potential decreases and the inductor emf is constant.

The resistor potential decreases and the inductor emf increases.

The resistor potential decreases and the inductor emf decreases.

The resistor potential increases and the inductor emf increases.

The resistor potential increases and the inductor emf is constant.

The resistor potential increases and the inductor emf decreases.

Answer:

The resistor potential increases and the inductor emf decreases.

Explanation:

From Kirchoff's rule, we can easily see that voltage across the inductor decreases steadily in a RL circuit until it finally gets to zero when the circuit is connected to a battery. A graph of the drop in potential across the inductor is attached for more clarity.

The drop shown in figure (b) in the image attached is the drop in potential across the inductor when an RL circuit is connected to a battery.

6 0
4 years ago
What are three foods that would be considered good energy sources?
jok3333 [9.3K]
Almonds, like many nuts, are one of the best plant sources of protein. Protein will help regulate your blood sugar and keep your energy level stable throughout the day. Oats contain the energizing and stress-lowering B vitamin family, which helps transform carbs into usable energy. Water, without water, your body cannot generate energy.
5 0
3 years ago
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Kirk wants to know if someone his height will go faster on a bike with a larger frame. What should he do next in order to follow
bearhunter [10]

Answer:

The answer is A but I could be wrong

8 0
3 years ago
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