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ZanzabumX [31]
3 years ago
5

A planet in elliptical orbit around a star moves from the point in its orbit furthest from the star (A) to the closest point (P)

. Choose the planet to be your system. The work done by the force of gravity during this movement is:
Physics
1 answer:
Virty [35]3 years ago
6 0

Answer:

Zero work done,since the body isn't acting against  or by gravity.

Explanation:

Gravitational force is usually  considered as work done against gravity (-ve) and work by gravity ( +ve ) and also When work isn't done by or against gravity work done in this case is zero.

Gravitational force can be define as that force that attracts a body to any other phyical body or system that have mass.

The planet been considered as our system in this case is assumed to have mass, and ought to demonstrate such properties associated with gravitational force in such system. Such properties include the return of every object been thrown up as a result of gravity acting downwards. The orbiting nature of object along an elliptical part when gravitational force isn't acting on the body and it is assumed to be zero.

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A gnat takes off from one end of a pencil and flies around erratically for 41.641.6 s before landing on the other end of the sam
wlad13 [49]

Answer:

average speed  is 0.159 m/s

average velocity = 0.0011 m/s

Explanation:

given data

time = 41.6 s

total distance = 6.65 m

length = 0.0463 m

to find out

average speed and the magnitude average velocity

solution

we know average speed formula is

average speed = \frac{total distance}{total time}   ...............1

put here value

average speed = \frac{6.65}{41.6}

average speed  is 0.159 m/s

and

average velocity formula is

average velocity = \frac{displacement}{total time}   ...............2

here displacement is initial point to final point and here is 0.0463 m

put here value

average velocity = \frac{0.0463}{41.6}

average velocity = 0.0011 m/s

6 0
4 years ago
Gravity can be described as?
torisob [31]
A constant? A force? Sorry... Not too sure what you're asking.
7 0
3 years ago
The density of a substance is calculated by what
pav-90 [236]

Answer:

Dividing mass by volume

Explanation:

Density of a substance is defined as the mass per unit volume of the same substance. Assuming the mass of the substance is 10 Kg and it displaces volume equivalent to 5 cc then its volume will be 10/5= 2 Kg/cc. Basically, to get the density of a substance, we divide the given mass by volume

8 0
3 years ago
If an object is moving up, is it considered to have a positive or negative velocity?
grin007 [14]

Answer:

A positive velocity

Explanation:

7 0
3 years ago
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deff fn [24]

Answer:

it is D

Explanation:

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