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4 years ago

If the acceleration of a system is zero, are no external forces acting on it? what about internal forces? explain your answers.

Physics

2 answers:

lukranit [14]4 years ago

8 0

Answer:

Yes

May not be zero

Explanation:

a) When a acceleration of a system = 0

F = m*a = 0

Hence,

All resultant external forces are zero

b) A system may consists of multiple masses or objects interacting with one another. Hence, those internal are non zero for the system to remain intact

E.g two boxes riding on one another moving at a constant speed.

Hence, a single object system has zero internal forces; however, a multiple objects system will have non zero internal forces

makvit [3.9K]4 years ago

7 0

It is not possible for an object to have no external/internal forces acting on it. To have an acceleration of 0, the forces acting on the object balance out, leading to the object remaining static.

Hope I helped :)

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An electric field of intensity 3.25 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.

jekas [21]

Answer:

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$\varphi_2= 0 N m^2/C$

$\varphi_3=686.1 N m^2/C$

Explanation:

From the question we are told that

Electric field of intensity $E= 3.25 kN/C$

Rectangle parameter Width $W=0.350 m$ Length $L=0.700 m$

Angle to the normal $\angle=30.5 \textdegree$

Generally the equation for Electric flux at parallel to the yz plane $\varphi_1$ is mathematically given by

$\varphi_1=EA cos theta$

$\varphi_1=3.25* 10^3 N/C * ( 0.350)(0.700) cos 0$

$\varphi_1= 796.25 N m^2/C$

Generally the equation for Electric flux at parallel to xy plane $\varphi_2$ is mathematically given by

$\varphi_2=EA cos theta$

$\varphi_2=3.25* 10^3 N/C * ( 0.350)(0.700) cos 90$

$\varphi_2= 0 N m^2/C$

Generally the equation for Electric flux at angle 30 to x plane $\varphi_3$ is mathematically given by

$\varphi_3=EA cos theta$

$\varphi_3=3.25* 10^3 N/C * ( 0.350)(0.700) cos 30.5$

$\varphi_3=686.072219 N m^2/C$

$\varphi_3=686.1 N m^2/C$

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