Answer:
If the cart is being pushed at a constant speed, then the acceleration in the direction of motion is zero. Hence, the force in the direction of the motion is zero, according to Newton's Second Law.
For simplicity, I will denote the direction along the inclined ramp as x-direction.
In the question the value of the force is not clearly given, so I will denote it as 
Here the angle between the applied force and the x-direction is 12° + 17° = 29°
The x-component of the weight of the cart is equal to sine component of the weight.
Since the cart is rolling on tires the kinetic friction does no work.
Work done by the applied force:
Work done by the weight of the cart:
Since the x-component of the weight is in the -x-direction, its work is negative.
Conveniently, the total work done on the particle is zero, since its velocity is constant.
Pierre curie was the one who discovered radium
When a beam of light is traveling through air and is reflected by a glass surface, then the 2R / (1+R) is the total reflectance through a glass window.
To find the answer, we have to know about reflection.
<h3>
What is reflection by glass surface?</h3>
- Depending on the angle of incidence, the refractive indices of the glass and the light's source, some light is reflected when it strikes a glass surface (e.g., air).
- The Fresnel equations can be used to calculate the percentage of transmitted and reflected light.
- Both the front and the rear of glass reflect the light that is traveling through it. In fact, the light may mirror itself several times. Therefore, 2R / (1+R) is the total reflectance through a glass window.
- These equations predict that ordinary soda-lime window glass will reflect around 8% of the light, assuming a perpendicular incidence angle and no absorption or scattering.
Thus, we can conclude that, when a beam of light is traveling through air and is reflected by a glass surface, then the 2R / (1+R) is the total reflectance through a glass window.
Learn more about the reflection here:
brainly.com/question/5012638
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Answer:
2ms-¹ means that the body under consideration moves 2m in a second, and may be it will continue to move 2m in every 1 second, if there's no external unbalanced force acting on that body (those forces do include frictional forces). mark its brainlist plz. Kaneppeleqw and 6 more users found this answer helpful. Thanks 3.
