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Tresset [83]
3 years ago
13

A constant force of 40N acting on a body initially at rest gives it an acceleration of 0.1m/s inverse 2 for 4s .calculate the wo

rk-done by the force​
Physics
1 answer:
kicyunya [14]3 years ago
7 0

Correct Answer: Option C

<em>Explanation </em>

X = ut + 12at2

= (0 x 4) + (12 x 0.1 x 4 x 4)

= 0.8m

workdone = force x distance

= 40 x 0.8

= 32J

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Gauss’ law: a. Relates the surface charge density to the electric field.b. Relates the electric field at points on a closed surf
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Answer:

b. Relates the electric field at points on a closed surface to the net charge enclosed by that surface

Explanation:

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Two point charges 3q and −8q (with q &gt; 0) are at x = 0 and x = L, respectively, and free to move. A third charge is placed so
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Answer:

Explanation:

The unknown charge can not remain in between the charge given because force on the middle charge will act in the same direction due to both the remaining charges.

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force on it due to rest of the charges will be equal and opposite so

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force on it due to -Q and -8q will be equal

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Q = 8q  (x² / L²)

so charge required = - 8q  (x² / L²)

and its distance from x on negative x side = √3 L / (2√2 - √3 )

3 0
3 years ago
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