A satellite is held in orbit by a 2000- N gravitational
1 answer:
Answer:
The work done by gravity is zero.
Explanation:
Given that,
Gravitational force = 2000 N
Circumference = 80000 km
We need to calculate the work done by gravity
Using formula of work done
Here, = 0
Because, for a circular motion is always perpendicular to the force.
Where, F = force
d = distance
Put the value into the formula
Hence, The work done by gravity is zero.
You might be interested in
For a lens, the following sign convention is generally used:
- f (the focal length) is positive for a converging lens and negative for a diverging lens
-
(the distance of the object from the lens) is positive if the object is in front of the lens and negative if it is behind the lens
-
(distance of the image from the lens) is positive if the image is behind the lens (real image) and negative if the image is in front of the lens (virtual image)
Therefore, the correct option is
<span>A. +di
</span>which mens that the image is real and located behind the lens.
- f (the focal length) is positive for a converging lens and negative for a diverging lens
-
-
Therefore, the correct option is
<span>A. +di
</span>which mens that the image is real and located behind the lens.
Answer:
Explanation:
Power rating of a solar panel is 1.50 KW/m²
It generates 2.50 MJ in an hour.
We need to find the area of this type of solar panel would be needed. The power pertaining to generate this energy is given by :
Let A be the area of the solar panel. It is calculated as follows :
So, the required area of the solar panel is .