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hjlf
4 years ago
15

Leah is using a 3.4-meter ladder to paint the exterior of her house. Leah has a mass of 50 kilograms. The acceleration due to gr

avity is equal to 9.8 meters per second squared. What force, in Newton’s, does Leah exert on the ladder when standing on it?
Physics
2 answers:
allsm [11]4 years ago
3 0
The equation is Force = mass times acceleration so:
50 x 9.8 = 490 N
ExtremeBDS [4]4 years ago
3 0

Answer: 490 Newton.

The length of ladder is, <em>l</em> = 3.4 m.

The mass of leah is,m = 50 kg.

The acceleration due to gravity is, <em>g</em> = 9.8 m/s².

When Leah stand on the ladder the force exerted by her on the ladder is equal to her weight.F = W

Weight of leah is,

W=mg=50 \text k \text g \times 9.8 \text m / \text s^2 = 490 \text N


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4 0
3 years ago
Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, th
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E_total = 3 N / A

Explanation:

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               E_total = E + E₁

the expression for the field of a point charge is

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for the point x = 2m, they do not say that the total field is zero, so the charge q1 must be negative

                 E_total = E -k q₁ / r₂

we substitute

                   0 = E - k q₁ / r²

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let's calculate

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