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aleksandrvk [35]
3 years ago
5

A car with a mass of 650kg is moving with a speed of 22m/s calculate the kinetic energy of the car.

Physics
1 answer:
Licemer1 [7]3 years ago
4 0

Answer:

<h2>157,300 J</h2>

Explanation:

The kinetic energy of the car can be found by using the formula

k =  \frac{1}{2} m {v}^{2}  \\

m is the mass

v is the velocity

From the question we have

k =  \frac{1}{2 }  \times 650 \times  {22}^{2}  \\  = 325 \times 484

We have the final answer as

<h3>157,300 J</h3>

Hope this helps you

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A projector is placed on the ground 22 ft. away from a projector screen. A 5.2 ft. tall person is walking toward the screen at a
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y = 67.6 feet,   y = 114.4/ (22 - 3t)

Explanation:

For this exercise let's use that light travels in a straight line and some trigonometric relationships, the symbols are in the attached diagram

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         tan θ = y / L

For the small triangle. Projector up to the person

         tan θ = y₀ / (L-d)

The angle is the same, so we equate the two equations

         y₀ / (L -d) = y / L

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        d = v t

we replace

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This is the equation of the shadow height change as a function of time

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3 years ago
a cylindrical jar is 10cm long and has a cross sectional area of 36cm. if it is completely filled with a fluid of relative densi
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Answer:

The mass of the fluid is 72 g.

Explanation:

The following data were obtained from the question:

Height (h) = 10 cm

Area of cross section (A) = 36cm²

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Next, we shall determine the volume of the cylinder. This can be achieved by doing the following:

Volume = Area x Height

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Volume = 360 cm³

Next, we shall determine the density of the liquid.

This can be obtained as follow:

Relative density = density of substance/density of water.

Relative density = 0.2

Density of water = 1 g/cm³

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0.2 = density of fluid / 1 g/cm³

Cross multiply

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Cross multiply

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