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tiny-mole [99]
3 years ago
6

Compare the kinetic and potential energies of a 400 kg box being moved

Physics
1 answer:
aniked [119]3 years ago
5 0

Answer: B is the answer .

Explanation:

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the cross section area of a hole is 725cm^2. Given that the area of a circle is A=3.14r^2 , find the radius of the hole.
asambeis [7]
The\ area\ of\ a\ circle\ =  \pi r^2 \\ 725\ cm^2 =  3.14r^2 \\
230.57 cm^2 = r^2 \\ \sqrt{230.57\ cm^2} = r \\ \boxed{r = 15.18\  cm}
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Social assistance is a synonym for social service.<br> False<br> True
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Why we study physics ?
vagabundo [1.1K]
To know what is it. and i think that the reason behind your question is that PHYSICS IS DAMM HARD
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in case one, a car speeds up from zero m/s to 15 m/s. in case two, the same car speeds up from 15 m/s to 30 m/s. the mass of the
GrogVix [38]

Three time  the energy was needed than in case one.

What is energy?

In physics, energy is the quantifiable property that is transmitted to a body or a physical system and is visible in the form of heat and light. The law of conservation of energy states that energy can be converted in form but cannot be created or destroyed.

Case 1:

Vo = 0 m/s

V1 = 15 m/s

Case 2:

Vo = 15 m/s

V1 = 30 m/s

Change in KE = 1/2 × m × (V1^2 - Vo^2)

KE1 = 1/2 × 1000 × (15^2 - 0)

= 112.5 kJ

KE2 = 1/2 × 1000 × (30^2 - 15^2)

= 1/2 × 1000 × 675

= 337.5kJ

Case 1 has an increase of 112.5 kJ energy while Case 2 has an increase of 337.5kJ.

To know more about energy click

brainly.com/question/582060

#SPJ4

7 0
9 months ago
What effect does a doubling of the mass have upon the acceleration of the object
scZoUnD [109]
Hello there!

Your question can be answered using the Newton's Secon Law of Motion:

This Law says that the forces on an object are equal to the product of its mass (m) and acceleration (a):

F=m*a

If we clear this equation for acceleration, we'll see that:

a= \frac{F}{m}

So, studying this equation, we'll see that acceleration is inversely proportional to mass, thus, assuming that the force remains constant, doubling the mass will decrease the acceleration of the object by half. 
5 0
2 years ago
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