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3 years ago

What is the formula for moment in physics

Physics

2 answers:

goblinko [34]3 years ago

8 0

<span>Moment = Force × Perpendicular distance from the pivot</span>

Viefleur [7K]3 years ago

4 0

We define the turning effect with the equation: Moment = Force × Perpendicular distance from the pivot. Since force is measured in newtons (N) and distances in metres (m) the unit for a moment is the newton-metre (Nm). Moments can act in two ways: clockwise or anticlockwise.

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a concrete slab 20 m long and weighing 400,000 N is supported by one pillar. A 19,600 N car is parked 8 meters from one end, whe

Elden [556K]

let the distance of pillar is "r" from one end of the slab

So here net torque must be balance with respect to pillar to be in balanced state

So here we will have

$Mg(r - L/2) = mg(L/2 - 8)$

here we know that

mg = 19600 N

Mg = 400,000 N

L = 20 m

from above equation we have

$400,000(r - 10) = 19,600 (10 - 8)$

$r - 10 = 0.098$

$r = 10.098 m$

so pillar is at distance 10.098 m from one end of the slab

3 0

3 years ago

What is the strength of an electric field that will balance the weight of a 3.3 g plastic sphere that has been charged to -7.6 n

sp2606 [1]

As the plastic sphere is charged, therefore it experience an electric force when placed in an electric fields and also experiences gravitational force acts downward so the electric force must act upward.

Let $F_{E}$ is electric force and $F_{G}$ is gravitational force.

If these forces are balanced, therefore $F_{E} = F_{G}$

or $\left | q \right |E=mg\\\\\ E=\frac{mg}{\left | q \right |}$

Given, $q=-7.6 nC=-7.6\times10^{-9} C$ and $m=3.3 g= 3.3\times10^{-3} kg$ .

Substituting these values in above equation we get,

$E=\frac{3.3\times10^{-3} kg\times9.8 m/s^{2} }{7.6\times10^{-9} C}\\\\E=4.2\times10^{6} N/C$

Thus, the magnitude of electric field is $4.2\times10^{6} N/C$ .

As the charge is negative, the electric field at the location of the plastic sphere must be pointing downward.

8 0

3 years ago

AlekseyPX

I believe it’s tackling but I’m not quite sure

4 0

4 years ago

Read 2 more answers

Which of the following is true regarding the properties of light?

Ivanshal [37]

Light having a dual nature and acting like both a wave and a particle is the correct statement in this scenario.

<h3>What is Light?</h3>

This refers to the electromagnetic radiation found in the electromagnetic spectrum that is perceived by the human eye and has a dual nature. It doesn't require a medium for its propagation unlike sound.

The dual nature of light is as a result of it behaving like a photon which is why it travels in straight lines.

It also behave like a wave because it undergoes processes such as reflection, refraction etc which are common to waves.

Read more about Light here brainly.com/question/1363382

#SPJ1

6 0

2 years ago

A yo‑yo with a mass of 0.0800 kg and a rolling radius of =2.70 cm rolls down a string with a linear acceleration of 5.70 m/s2.

N76 [4]

Explanation:

Given that,

Mass, m = 0.08 kg

Radius of the path, r = 2.7 cm = 0.027 m

The linear acceleration of a yo-yo, a = 5.7 m/s²

We need to find the tension magnitude in the string and the angular acceleration magnitude of the yo‑yo.

(a) Tension :

The net force acting on the string is :

ma=mg-T

T=m(g-a)

Putting all the values,

T = 0.08(9.8-5.7)

= 0.328 N

(b) Angular acceleration,

The relation between the angular and linear acceleration is given by :

$\alpha =\dfrac{a}{r}\\\\\alpha =\dfrac{5.7}{0.027}\\\\=211.12\ m/s^2$

(c) Moment of inertia :

The net torque acting on it is, $\tau=I\alpha$ , I is the moment of inertia

Also, $\tau=Fr$

So,

$I\alpha =Fr\\\\I=\dfrac{Fr}{\alpha }\\\\I=\dfrac{0.328\times 0.027}{211.12}\\\\=4.19\times 10^{-5}\ kg-m^2$

Hence, this is the required solution.

3 0

3 years ago