Two students are pushing identical crates across a frictionless floor. the crates are initially at rest. bing applies a horizontal force of 23 n to his crate. bob, who is shorter than bing, pushes on his crate at an angle of 33° below the horizontal, also with a force of 23 n. find the ratio of the masses of the two crates if bing’s crate is moving at twice the speed of bob’s crate after they have traveled a distance of 33.5 m across the floor? (20 pts)

Explanation:

As we know that both the crates are moving at different speed after moving 33.5 m

speed of bling crate = 2 (speed of bob crate)

now we know that

Bling apply force horizontal so the acceleration of his crate is given as

now force of Bob is at 33 degree with the horizontal

so the acceleration of crate of Bob is given as

now we know that work done by Bling and bob on their crate is equal to the kinetic energy of the crate

so for Bling's and Bob'scrate we can say

now the ratio of the work done of two is given as

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the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.