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Ainat [17]
4 years ago
13

t or f if an object has a canstant acceleration it must ve changing velocity at the same rate over over again

Physics
1 answer:
Angelina_Jolie [31]4 years ago
7 0
The answer to your question is True
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Three objects having the same mass begin at the same height, and all move down the same vertical distance H. One falls straight
Mnenie [13.5K]

Answer:

Work done in all the three cases will be the same.

Explanation:

1) The free falling body has only one force acting on it, the gravitational force. The work done on the body = mgH (Gravitational potential energy)

2) There are two forces acting on the body going down on a frictionless inclined plane - gravity and the normal force. The gravitational potential energy will be the same. The work done due to the normal force is zero, since the direction of the force is perpendicular to the displacement. Hence, total work done on the body = mgH

3) In the case of the body swinging on the end of a string, the change in gravitational potential enrgy will once again be the same since difference in height is H. The additional force on the body is the tension due to the string. But the work done due to this force is <em>zero, </em>since the displacement of the body is perpendicular to the tension. Therefore, the total work done on the body is once again mgH.

4 0
3 years ago
I really need help on this
Fed [463]
Question is not clear
3 0
3 years ago
Which image is observe by seeing a distant thing using magnifying glass?
lesya692 [45]

Answer:

1/f = 1/o + 1 /i       thin lens equation

1 / i = 1/f - 1/o = (o - f) / (o f)    rearranging

or i = o f / (o - f)   for the image distance

This image will be positive (real) with values given

m = -i / o      magnification

m = - f / (o - f)      shows m is negative and the image inverted

Also, since o here is large m will be small and the image is small

I think they mean A as the right answer

Different texts use different terms but here i is image distance and o the object distance

7 0
3 years ago
Read 2 more answers
If you travel 1.7 km north from your house at noon, and at 6:00 PM you travel 5.4 km south, what is your displacement? 3.7 km no
Yakvenalex [24]

<u>Answer</u>

3.7 Km south


<u>Explanation</u>

The definition of displacement is the distance traveled in a specific direction. It is the vector quantity. We add displacements like the way we add vectors.

Taking the direction towards North to be positive (+1.7 Km), the distance towards south would be negative (-5.4 Km).

Now lets add the two values.

(+1.7) + (-5.4) = 1.7 - 5.4

                    = - 3.7 Km      But negative was towards south.

∴ Answer = 3.7 Km south.


6 0
3 years ago
Two 5.0 mm × 5.0 mm electrodes are held 0.10 mm apart and are attached to 7.5 V battery. Without disconnecting the battery, a 0.
antiseptic1488 [7]

Answer: A) 7.5v

B) 75000v/m

C) 1.66×10^-11

D) 7.5v

E) 232500v/m

F) 5.15×10^-11

Explanation:

The potential difference will be the same for the two cases.

Please find the attached file for the solution

4 0
3 years ago
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