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r-ruslan [8.4K]
3 years ago
6

If a box is being pushed along a horizontal service what are the four main forces involved

Physics
2 answers:
Alisiya [41]3 years ago
7 0

The answer is compression, normal, tension, weight

AleksandrR [38]3 years ago
3 0
ΣF = ma F(horizontal force/push) - μmg = ma F - (0.35)(50)(9.8) = (50)(1.2) F = 231.5 Newtons => Final answer!
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(a) Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is 30.0 m. Assume the density of t
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Answer:

(a) The absolute pressure at the bottom of the freshwater lake is 395.3 kPa

(b) The force exerted by the water on the window is 36101.5 N

Explanation:

(a)

The absolute pressure is given by the formula

P = P_{o} + \rho gh

Where P is the absolute pressure

P_{o} is the atmospheric pressure

\rho is the density

g is the acceleration due to gravity (Take g = 9.8 m/s^{2} )

h is the height

From the question

h = 30.0 m

\rho = 1.00 × 10³ kg/m³ = 1000 kg/m³

P_{o} = 101.3 kPa = 101300 Pa

Using the formula

P = P_{o} + \rho gh

P = 101300 + (1000×9.8×30.0)

P = 101300 + 294000

P =395300 Pa

P = 395.3 kPa

Hence, the absolute pressure at the bottom of the freshwater lake is 395.3 kPa

(b)

For the force exerted

From

P = F/A

Where P is the pressure

F is the force

and A is the area

Then, F = P × A

Here, The area will be area of the window of the underwater vehicle.

Diameter of the circular window = 34.1 cm = 0.341 m

From Area = πD²/4

Then, A = π×(0.341)²/4 = 0.0913269 m²

Now,

From F = P × A

F = 395300 × 0.0913269

F = 36101.5 N

Hence, the force exerted by the water on the window is 36101.5 N

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Answer:

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Which of the following represents a chemical change to matter? A. digestion of food B. melting an ice cube C. shredding paper D.
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The answer is A. digestion of food. The chemical change to matter means that the molecule structure has been destroyed. For B, C and D. the matter are still ice, paper and ice. So they are physical change.
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3 years ago
2. A projectile is launched at a speed of 35 m/s and an angle of 40 above the horizontal.
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Answer:

hello hi how are you glad you're good goodbye

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2 years ago
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