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stiv31 [10]
3 years ago
12

Would the friction force increase, decrease, or stay the same if Marco added two more blocks to the sled or wagon? Explain your

answer.
Physics
1 answer:
mel-nik [20]3 years ago
4 0
<em>yes the friction will increase but co.effecient of friction remains constant ..
<u>explanation :
</u>
    it is so because more the normal reaction of the surface increases more will be the friction .. 
here normal reaction increases as more force ( weight )  is applied on it ,, which in turn increases friction ..
doubling applied weight means doubling the normal force that leads to double the friction as well ..
weight will be equal to the normal reaction when the surface is balanced or levelled .. but opposite in direction ,, it will be upward as weight acts directly downward ..</em>
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Three charges 1.5*10-6, 3*10-6, -3*10-6 are placed at three vertices of an equilateral triangle of side 30cm. Find the net force
gulaghasi [49]

Answer:

F = 0N

Explanation:

The force between two charges is given by

F=k\frac{q_1q_2}{r^2}

where r is the distance between the charges and K is the Coulomb's constant

(k=8-89*10^9Nm^2/C^2)

The force in the first charge is only the sum of the forces due to the other charges. Hence we have

F_T=F_1+F_2=k\frac{q_2q_1}{r^2}+k\frac{q_3q_1}{r^2}

F_T=(8.89*10^9\frac{Nm^2}{C^2})\frac{(3*10^{-6}C)(1.5*10^{-6}C)}{(0.3m)^2}+(8.89*10^9\frac{Nm^2}{C^2})\frac{(-3*10^{-6}C)(1.5*10^{-6}C)}{(0.3m)^2}\\\\F_T=0.445N-0.445N=0N

Ft=0N

Hope this helps!!

5 0
3 years ago
Read 2 more answers
What is 2.5 meters in feet?
miss Akunina [59]
If there are about 3.2 feet in a meter then multiply. 
2.5 * 3.2 = 8
5 0
4 years ago
Read 2 more answers
a teacher drives from school to the mall. then she goes to the doctors office for a physical examination. what is the magnitude
Amanda [17]

The magnitude of the teachers displacement is the difference between

the location of the school and the location of the doctors office

The reason behind the above expression are explained as follows

The known locations of the teacher;

Initial location; The school

Second location; The mall

The eventual location; The doctors office

The required information;

The magnitude of the teachers displacement

The method of obtaining the displacement of the teacher;

Qualitatively, the displacement of the teacher can be obtained by applying the definition of displacement as follows;

The definition of displacement is an object's change in position, given by the difference between its start and finish locations

According to the definition of displacement, therefore, the magnitude of

the teachers displacement is the distance between the school and the

doctors office which is given by the difference between the coordinates of

the location of the school and the location of the doctors office

The magnitude of the displacement of the teacher = The coordinate of the location of the doctors office - The coordinate of the location of the school

Learn more about displacement here;

brainly.com/question/17587058

5 0
3 years ago
What is the density of a substance if 17 cm cubed has a mass of 35.7g
Arisa [49]

Density = (mass) / (volume)

Density = (35.7 g) / (17 cm³)

Density = 2.1 g/cm³


4 0
3 years ago
Can someone please help on this one?
zhuklara [117]

Please READ Newton's first law of motion, and you'll see how nicely it explains that fact.

8 0
4 years ago
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