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sasho [114]
3 years ago
11

A rubber band has a spring constant of 15 N/m. If you stretch it by 0.3 m,

Physics
1 answer:
borishaifa [10]3 years ago
5 0

Answer:

B. 4.5N

Explanation:

F = kx

Where

F = force

K = spring constant

x = compression

Given

K = 15N/m

x = 0.3m

Therefore

F = 15 x 0.3

F = 4.5N

The magnitude of the force that resists the stretching is 4.5N

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Two equal point charges QQQ are separated by a distance ddd. One of the charges is released and moves away from the other due on
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Answer:

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Explanation:

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Now, for the two charges q₁ = q₂ = Q separated by a distance d, the initial potential energy is U₁ = kQ²/d. The initial kinetic energy of the system K₁ = 0 since there is no motion of the charges initially. When the moving charge is at a distance of r = 3d, the potential energy of the system is U₂ = kQ²/3d and the kinetic energy is K₂.

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