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Zarrin [17]
3 years ago
15

A device designed to shoot projectiles consists of a spring with spring constant kmewtons/meter that has been compressed Δx mete

rs. A marble of mass m kilograms is loaded into the device. If the entire device is at an initial height h meters and is moving at an initial velocity v meters/second, which equation best represents the magnitude of the total initial energy E, in joules, of the system?
E=12mgh+12kΔx2+12mv2

E=mgh+kΔx2+mv2

E=mgh+12kΔx2+12mv2

E=mgh+kΔx2+12mv2
Physics
1 answer:
8090 [49]3 years ago
6 0

Answer:

E=mgh+1/2kΔx2+1/2mv2

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light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 87% of the intensity of
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Polarized light waves are those that have only one plane of vibration. Polarization is the process by which non-polarized light is converted into polarised light. There are numerous ways to polarise light.

A characteristic of transverse waves called polarisation identifies the geometric angle of the oscillations. A transverse wave's oscillation direction is perpendicular to the wave's motion direction.

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Only 72.0% of the light's intensity makes it through the sheet and hits another sheet of polarising material. The second sheet lets no light flow through it.

Given that no light passes through the second sheet because both sheets are crossed, the angle the transmission axis of the second sheet makes with the vertical is

θ₂ = θ₁ + 90°

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I/I₀ = 0.72

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for the second sheet, respectively. This is because the malus law states that I = Iocos²θ₁ for the first sheet.

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In a loop-the-loop ride a car goes around a vertical, circular loop at a constant speed. The car has a mass m = 268 kg and moves
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Before we go through the questions, we need to calculate and determine some values first.

r = 11.5 m 
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<span>2) What is the magnitude of the normal force on the car when it is at the side of the circle. </span>

<span>Centripetal force = 7119.55 N </span>


<span>3) What is the magnitude of the normal force on the car when it is at the top of the circle. </span>

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<span>4) What is the minimum speed of the car so that it stays in contact with the track at the top of the loop. </span>

√<span>(gr) </span>

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