As Shown in the Figure, Two Blocks Are Connected by a Very

question 67

Short Answer

As shown in the figure, two blocks are connected by a very light string, and the upper block is pulled upward by a different string. The masses of the upper and lower blocks are 300 g and 240 g, respectively. The string between the blocks will break if its tension exceeds 3.6 N, and the string that pulls the combination upward will break if its tension exceeds 7.8 N.
(a) What is the largest upward acceleration that the blocks can be given without either string breaking?
(b) If the upward acceleration is slightly higher than this, which string breaks, the upper one or the lower one?

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Definitions:

Variable Cost

Costs that fluctuate in direct proportion to changes in levels of output or activity within a business.

Fixed Cost

Expenses that do not change in total over a certain range of activity levels or time periods, such as rent, salaries, and equipment leases.

Administrative Expense

Costs associated with the general administration of a business, including salaries of senior executives, legal and financial fees, and other general expenses.

Fixed Cost

Overheads that are not affected by the volume of production or sales, covering rent, employee salaries, and insurance fees.