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Inga [223]
3 years ago
12

A woman does 236 J of work

Physics
1 answer:
mamaluj [8]3 years ago
6 0

Answer:

Explanation:

Step one:

Given data

work-done in dragging the trash= 236J

applied force= 18.9N

distance moved= 24.4m

Required

The angle of the applied force

Step two:

We know that work done is

WD= F * distance

<em>The work is the product of the horizontal component of the force and the distance. </em>

Horizontal force = 236 ÷ 24.4

= 9.67 N

Cos θ = Horizontal force ÷ Actual force

Cos θ = (236 ÷ 24.4) ÷ 18.9 = 236 ÷ 461.16

The angle is approximately 59˚

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Answer:

The force needed to push a block of ice is 100 N.

Explanation:

It is given that,

Length of the friction less plane, l = 6 m

Height of the wall, h = 2 m

Weight of the block of ice, W = 300 N

The length of the inclined plane and the height of the wall act as hypotenuse and the perpendicular of the right angled triangle. Using trigonometry to find the angle as :

sin\theta=\dfrac{P}{H}

sin\theta=\dfrac{2}{6}

sin\theta=\dfrac{1}{3}

Force needed to push a block of ice weighing 300 N up the plane is equal to the horizontal component of the force as :

F_x=F\ sin\theta

F_x=300\times \dfrac{1}{3}

F_x=100\ N

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How does friction affect work
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