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2 years ago

State the Newton's second law of motion

Physics

2 answers:

Llana [10]2 years ago

6 0

Answer:

It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it. ... The momentum of a body is equal to the product of its mass and its velocity.

kirza4 [7]2 years ago

5 0

F = m x a (Force is equal to mass times acceleration)

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What is the magnitude (in N/C) and direction of an electric field that exerts a 4.00 x 10^−5 N upward force on a −2.00 µC charge

emmasim [6.3K]

Answer:

The magnitude of electric field is $1.25\times10^{14}\ N/C$ in downward.

Explanation:

Given that,

Force $F= 4.00\times10^{-5}\ N$

Charge q= -2.00 μC

We know that,

Charge is negative, then the electric field in the opposite direction of the exerted force.

We need to calculate the magnitude of electric field

Using formula of electric force

$F = qE$

$E = \dfrac{F}{q}$

$E=\dfrac{4.00\times10^{-5}}{-2.00\times1.6\times10^{-19}}$

$E=-1.25\times10^{14}\ N/C$

Negative sign shows the opposite direction of electric force.

Hence, The magnitude of electric field is $1.25\times10^{14}\ N/C$ in downward.

8 0

4 years ago

Name the type of component that has a greater resistance as the current through it increases

Gnesinka [82]

Answer:

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Explanation:

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4 years ago

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o-na [289]

The formula PE(Potential Energy)= mgh

4 0

3 years ago

Which of the following has a positive charge and a mass of one?

Dmitrij [34]

Answer:

the answer is protons b

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6 0

3 years ago

Find the weight required to stretch a steel road by 2 mm, if the length of the road is 2 m and diameter 4 mm. Y= 200 GPa and g -

svetlana [45]

Answer:

Option D is the correct answer.

Explanation:

We equation for elongation

$\Delta L=\frac{PL}{AE}$

Here we need to find weight required,

We need to stretch a steel road by 2 mm, that is ΔL = 2mm = 0.002 m

$A=\frac{\pi d^2}{4}=\frac{\pi ({4\times 10^{-3}})^2}{4}=1.26\times 10^{-5}m^2$

E = 200GPa = 2 x 10¹¹ N/m²

L=2m

Substituting

$0.002=\frac{P\times 2}{1.26\times 10^{-5}\times 2\times 10^{11}}\\\\P=2520N=256.4kg$

Option D is the correct answer.

6 0

3 years ago

State the Newton's second law of motion​

State the Newton's second law of motion