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antiseptic1488 [7]
3 years ago
5

a student pushes a 40 in Block across the floor for a distance of 10 meters how much work was done to move the block A) 4j. B) 4

0j. C) 400j D) 4,000
Physics
1 answer:
Gemiola [76]3 years ago
4 0
Work = Force * distance
Work = 40N * 10m
Work = 400N
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0 Newtons

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2 years ago
Please help, my homework is due in a couple of days and I'm stuck. A plane is travelling 10.0 meters per second (this means the
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Answer:

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Explanation:

(a) Just as one-dimensional numbers add on a number line by putting them end-to-end, so two-dimensional numbers add on a coordinate plane the same way.

Here, we choose to let the positive y-axis represent North, and the positive x-axis, East. This is the way a map is conventionally oriented. The velocity of the plane is represented by a vector pointing north (up). Its length represents the magnitude of the velocity. Likewise, the wind is represented by a vector of length 15 pointing east (right). The sum of these is the hypotenuse of the triangle they form.

The magnitude of the sum can be found here using the Pythagorean theorem, but for the purpose of this question, you're not asked to find that.

Instead, you're asked to estimate whether it is more or less than 25 (m/s).

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(b) The triangle inequality says the resultant is less than the sum of the other two sides of the triangle.

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(c) Since the wind is blowing the plane toward the east, but the plane is traveling toward the north, the resulting direction is somewhere between north and east.

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(d) "Somewhere between north and east" can be expressed as the inequality ...

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The most useful meteorological measurement for forecasting freezing precipitation is b. radiosonde soundings

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