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Greeley [361]
3 years ago
12

Which one of the following is not a balanced equation?

Physics
1 answer:
tekilochka [14]3 years ago
6 0
(b)equation is not balanced
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the normal force is the force applied opposite to the weight of the was box. So the normal force is equal to the weight of the box = 24 kg *(9.81 m/s2) = 235.44 N

the acceleration of the box be solve using newtons 2nd law of motion:

F = ma

a = F/ m = 585 N/ 24 kg = 24.38 m/s2

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A book has been lifted 1.5 meters into the air giving it 30J of potential energy. How much force was used to lift it
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Force on the object is 20 N

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As we know that work done to raise the book from initial position to final position is known as potential energy stored in it

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A charge Q is uniformly spread over one surface of a very large nonconducting square elastic sheet having sides of length d. At
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The electric field of a very large (essentially infinitely large) plane of charge is given by:

E = σ/(2ε₀)

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σ = Q/A

Where Q is the total charge of the sheet and A is the sheet's area. The sheet is a square with a side length d, so A = d²:

σ = Q/d²

Make this substitution in the equation for E:

E = Q/(2ε₀d²)

We see that E is inversely proportional to the square of d:

E ∝ 1/d²

The electric field at P has some magnitude E. Now we double the side length of the sheet while keeping the same amount of charge Q distributed over the sheet. By the relationship of E with d, the electric field at P must now have a quarter of its original magnitude:

E_{new} = E/4

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It’s D

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Hope that helped lol!

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