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Andru [333]
1 year ago
7

What is the magnitude of a the vertical electric field that will balance the weight of a plastic sphere of mass 2. 1 g that has

been charged to -3. 0 nc? (k = 1/4πε0 = 9. 0 × 109 n ∙ m2/c2)
Physics
1 answer:
sladkih [1.3K]1 year ago
5 0

The magnitude of a vertical electric field that will balance the weight of a plastic sphere of mass 2. 1 g that has been charged to -3. 0 NC is 6.86 × 10^{6} N/C.

An electric field is the physical field that surrounds electrically charged particles and exerts a force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field of a system of charged particles.

It is given that,

Mass of sphere, m = 2.1 g =0.0021kg

Charge,q = ₋3nC = ₋ 3 ₓ 10^{-9}

To balance the weight of a plastic sphere, we must determine the magnitude of the electric field. So,

ma= qE

a = g

E = \frac{mg}{q}

E = \frac{0.0021 * 9.8}{-3 * 10^{-9} }

E = 6860000 N/C

E = 6.86 × 10^{6} N/C

Hence, the magnitude of the electric field that balances its weight is 6.86 × 10^{6} N/C .

To know more about  electric field refer to:  brainly.com/question/8971780

#SPJ4

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A 62kg box is lifted 12 meters off the ground. How much work is done?
Temka [501]

Answer: 7291.2 joules

Explanation:

Work is done when force is applied on an object over a distance.

Thus, Workdone = Force X distance

Since Distance moved by box = 12 metres

mass of box = 62kg

Acceleration due to gravity when box was lifted is represented by g = 9.8m/s^2

Recall that Force = Mass x acceleration due to gravity

i.e Force = 62kg x 9.8m/s^2

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So, Workdone = Force X Distance

Workdone = 607.6 Newton X 12 metres

Workdone = 7291.2 joules

Thus, 7291.2 joules of work was done.

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timofeeve [1]

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(a) when rebuilding her car's engine, a physics major must exert 300 n of force to insert a dry steel piston into a steel cylind
Vilka [71]
There are some missing data in the text of the problem. I've found them online:
a) coefficient of friction dry steel piston - steel cilinder: 0.3
b) coefficient of friction with oil in between the surfaces: 0.03

Solution:
a) The force F applied by the person (300 N) must be at least equal to the frictional force, given by:
F_f = \mu N
where \mu is the coefficient of friction, while N is the normal force. So we have:
F=\mu N
since we know that F=300 N and \mu=0.3, we can find N, the magnitude of the normal force:
N= \frac{F}{\mu}= \frac{300 N}{0.3}=1000 N

b) The problem is identical to that of the first part; however, this time the coefficienct of friction is \mu=0.03 due to the presence of the oil. Therefore, we have:
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likoan [24]

Gravity is the force that attracts all matter to each other.

Explanation:

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Gravity is a fundamental force that causes objects to have weight. Gravity acts on all matter and is a function of both mass and distance. Each object attracts every other object with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them. The force of attraction is, however, negligible between most objects because of their small size.

Gravitational force is given as:

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Keywords: gravity, Newton, Force, weight

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