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yousifgorgees101
17.07.2019 •
Mathematics
Three books (x, y, and z) rest on a table. x is on table, while y is stacked upon x, and z is stacked upon y. the weights of the books are mx = 4 n, my = 10 n and mz = 5 n. the net force acting on book y is:
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Ответ:
The free body diagram of book y indicates:
a weight of 5 N from book z, and a reaction of 5 N on book z;
a weight of 10 N acting on book x, and a reaction of 10 N from book x
The net downward force on book y is
5 + 10 - 10 = 5 n.
5 N, downward.
Ответ:
Yes, 35$ is indeed the correct answer.
Multiplication is repeated addition so if you haven't memorized the times table, you can work through this by adding 7 to itself for a total of 5 times: 7 + 7 + 7 + 7 + 7 = 35