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Mice21 [21]
2 years ago
5

how much gravity is done by a workman carrying a 8kg sheet plywood up a 3m ramp inclined at an angle of 20 degrees to the horizo

ntal?
Mathematics
1 answer:
CaHeK987 [17]2 years ago
3 0
Work is force times distance. Note that the only work done here is in the direction opposed to gravity, or if you prefer the change in height times the weight...

W=3sin20(8*9.8)

W≈80.44 J
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2 years ago
Select the two figures that are similar to the 9 by 6 figure that’s is shown.
Eduardwww [97]

Answer:

The correct option is 3. The green figure is similar to the 9 by 6 figure.

Step-by-step explanation:

Let a small square represents 1 unit.

From the given figure it is noticed that

1. The dimensions of red figure is 4 by 3.

2.The dimensions of brown figure is 4 by 6.

3.The dimensions of green figure is 2 by 3.

3.The dimensions of purple figure is 3 by 6.

The dimensions of given figure is 9 by 6. The proportion of its dimensions is

\frac{9}{6}=\frac{3}{2}

The corresponding sides of two similar figure are proportional. It means the ration of sides must be \frac{3}{2}.

The dimensions of green figure is 2 by 3. It means the proportion of its dimensions is \frac{3}{2}.

Therefore the correct option is 3. The green figure is similar to the 9 by 6 figure.

3 0
2 years ago
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Help me with this question!!!
qwelly [4]

Step-by-step explanation:

×=100

1. Divded 35 by 14 and u get 0.4

2

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6 0
2 years ago
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mr. john says that a new automobile decreases 37 1/2 of its value the first year. At this rate, how much will the first value of
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4 0
2 years ago
Omar recorded the number of hours he worked each week for a year. Below is a random sample that he took from his data. 13, 17, 9
dlinn [17]
Mean =  60 / 4 = 15

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because this is a sample we divide this by n - 1 ( = 3)

Standard deviation  =  sqrt (80/3)  = 5.16 answer




8 0
2 years ago
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