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german
3 years ago
10

What is the distance a truck can travel if it moves 7 m/s for 20 seconds?

Physics
2 answers:
ale4655 [162]3 years ago
8 0

If it moves 7 m/s and never slows down or speeds up, and it keeps doing this for 20 seconds, then it will cover 7 meters in the 1st second, 7 meters in the 2nd second, 7 meters in the 3rd second, 7 meters in the 4th second, 7 meters in the 5th second, and so on and so forth, twenty times.  All together, it'll cover

7+7+7+7+7+7+7+7+7+7+7+7+7+7+7+7+7+7+7+7 meters

What I did there was:  I wrote down ' 7 ' twenty times.

Now, there's a much easier way to write it.  

In arithmetic, a little dot like this --> · <-- means "times", so we can write

20 · 7  and then we can work it out with our calculator or our pencil.

20 · 7  = <em> 140 meters</em> .

artcher [175]3 years ago
6 0

if it moves 7m/s, that means every second it goes 7m.  Now we just multiply by the time (20 seconds) and end up with 140m.

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<h2>This is why the bug, which is at rest will remain at rest, although the ants are simultaneously pulling it in different directions, since the resultant of all these forces is zero.</h2>
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