Computers and Technology, 03.03.2020 03:22 jaass28

A ball is released from a 10 m high roof and bounces two thirds as high on each successive bounce. After traveling a total of 40 m (up and down motion), how many times did the ball bounce (e. g. touch the ground)? Put the answer in

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Answer from: mohd591

Four times traveling 40,12345 mts

Explanation:

We can express this as a sum as follows

$\sum_{i=1}^4(10\cdot \frac{2}{3}^{i - 1} + 10\cdot \frac{2}{3}^{i } ) = 3250/81=40.12345679$

The first term is the dropping part and the second is the upward motion. this sums up to 40,12345 m after bouncing four times. As a program we could write using the while loop.

distance=0;

i:=0;

while distance<40 do

i:=i+1;

distance:=distance+ $10\cdot \frac{2}{3}^{i - 1} + 10\cdot \frac{2}{3}^{i };$

end while;

Here the answer is in i and the closest distance traveled after reaching 40 is in the variable distance.

Answer from: Quest

a social news website is an internet website that features user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the slashdot and fark websites, administrators decide which articles are selected for the front page. on reddit and digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a social networking function, in that users can set up a user profile and follow other users' online activity on the website.

Answer from: Quest

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