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user100 [1]
3 years ago
15

If gravity is the only force present, what is the total mechanical energy of a

Physics
1 answer:
Y_Kistochka [10]3 years ago
3 0

Answer:

(D) is correct option.

Explanation:

At a particular time, the potential energy of a rock is 500 J and its kinetic energy is 600 J.

It is required to find the mechanical energy of the rock. Mechanical or total energy is the sum of kinetic and potential energy. So,

TE = K+ P

TE = 500 J + 600 J

TE = 1100 J

So, the total mechanical energy of a  rock is 1100 J. Hence, the correct option is (D).

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Troyanec [42]

Answer:

2

Explanation:

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2 years ago
samantha a high school teacher wants to spend more time with her children and is looking for a job in her field. what would be a
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She could look for an online job or a job she can work at from home.

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3 years ago
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Newton’s Second law of Motion (F = ma) is one of the basis of forces and motion. How is it very similar to his First law and why
koban [17]

Answer:

First law can be deduced from second law.

Acceleration may determine the position and velocity of the system.

Explanation:

When net force is zero, the second law is 0 = ma, or the motion is at constant speed. Thus first law establishes that when there are no forces, the object moves at constant speed, so first law is explained by using the second.

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3 years ago
The length and width of a rectangular room are measured to be 3.92 ± 0.0035 m and 3.15 ± 0.0055 m. In this problem you can appro
Pavel [41]

Answer:

A)A=12.2480\ m^2

B)12.2480\pm 0.1029\ m^2

Explanation:

<u>Given:</u>

Length of the room l= 3.92 ± 0.0035

Width of the room w= 3.15 ± 0.0055

A) Let A be the area of the room

A=l\times w\\A=3.92\times3.15\\A=12.2480\ \rm m^2

B)We will calculate uncertainty in each dimension

%uncertainty in length=\dfrac{0.0035}{3.92}\times 100=0.0892\ %

%uncertainty in width =\dfrac{0.0055}{3.15}\times 100=0.0174%

The uncertainty in area will be sum of uncertainty in length and width

%uncertainty in Area=  %uncertainty in length + %uncertainty in width

%uncertainty in Area=0.0892\ % + 0.0174\ %

%uncertainty in Area=0.0106

Uncertainty in Area=0.0106\times 12.2480=0.1029\ \rm m^2

There Area is12.2480 ± 0.1029\ \rm m^2

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3 years ago
Define kinetic energy?​
mariarad [96]
It is the energy an object has because of its motion.
5 0
3 years ago
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