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natita [175]
3 years ago
10

Which one of the following statements concerning the momentum of a system when the net force acting on the system is equal to ze

ro newtons is true?
a. The momentum of the system is increasing.
b. The momentum of the system is decreasing.
c. The momentum of the system is equal to zero kg .m/s.
d. The momentum of the system has a constant value.
e. The momentum of the system has a negative value.
Physics
1 answer:
Alex3 years ago
5 0

Answer:

D

Explanation:

According to newton's 2nd law rate of change of momentum is directly proportional to the force applied on the body. Since, net Force is zero this means momentum did not change or momentum of the body remained constant.

Hence, the system have constant value of momentum. Therefore, option D is correct.

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Answer:

I = 12.12 A

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formula

P=I^{2} R

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8 0
2 years ago
If a current of 2.0 A is flowing from point a to point b, the potential difference between Vb- Va (in V) is:
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Answer:

\huge\color{skyblue}\boxed{\colorbox{black}{Answer ☘}}

total \: resistance \: ( R_{t} ) = (3 + 1)ohm \\ (since \: the \: resistors \: are \: connected \\ in \: series)

current \: flowing \: through \: circuit(I)  = 2A \\  \\ now... \: by \: ohms \: law \\ V = IR\\ V = (2)(4) \\  =  > 8v

<h3>therefore , option (b) is correct!!</h3>

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5 0
2 years ago
Describe a simple experiment to verify the principle of moments
liubo4ka [24]
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5 0
3 years ago
An effort of 200 N is used to lift a load of 800 N by using a lever. If the load is at a distance of 40 cm from the fulcrum then
Alchen [17]

The effort distance​ will be 160 cm.Applying the moment at the center as follows will provide the effort distance:

<h3 /><h3>What is the mechanical advantage?</h3>

Mechanical advantage is a measure of the ratio of output force to input force in a system, it is used to obtain the efficiency of forces in levers and pulleys.

Given data;

Effort,\rm F_e=00 N

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The effort distance​ is found by applying the moment at the center as;

\rm F_e \times d= P \times  d' \\\\ 200 \  N \times d'=800 \ N \times 40 \ cm \\\\ d'=160 \ cm

Hence, the effort distance​ will be 160 cm

To learn more about the mechanical advantage refer to the link;

brainly.com/question/7638820

#SPJ1

7 0
2 years ago
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1 volt. 
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