Link BD consists of a single bar 30 mm wide and 12 mm thick. Knowing that each pin has a10 mm diameter, determine the maximum value of the average normal stress in the link BD if θ = 15 degrees.

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4) Depreciation per annum using straight line = (Cost - Residual Value)/Useful Life

= ($40,000,000 - $40,000)/6 years = $6,660,000 per year

Depreciation Schedule using the straight line method (Amounts in $)

Date	Asset Cost (A)	Depreciation for the year (B)	Accumulated Depreciation (C)	Book Value (A-C)
01/01/19	40,000,000			40,000,000
12/31/19	40,000,000	6,660,000	6,660,000	33,340,000
12/31/20	40,000,000	6,660,000	13,320,000	26,680,000
12/31/21	40,000,000	6,660,000	19,980,000	20,020,000
12/31/22	40,000,000	6,660,000	26,640,000	13,360,000
12/31/23	40,000,000	6,660,000	33,300,000	6,700,000
12/31/24	40,000,000	6,660,000	39,960,000	40,000
Total		39,960,000

5) Depreciation per hour = (Cost - Residual Value)/Useful Life in hours

= ($40,000,000 - $40,000)/24,000 hours = $1,665 per hour

Depreciation Schedule using the straight line method (Amounts in $)

Date	Asset Cost (A)	Depreciation for the year (B)	Accumulated Depreciation (C)	Book Value (A-C)
01/01/19	40,000,000			40,000,000
12/31/19	40,000,000	($1,665*4,500 hrs) = 7,492,500	7,492,500	32,507,500
12/31/20	40,000,000	($1,665*6,000 hrs) = 9,990,000	17,482,500	22,517,500
12/31/21	40,000,000	($1,665*5,200 hrs) = 8,658,000	26,140,500	13,859,500
12/31/22	40,000,000	($1,665*4,300 hrs) = 7,159,500	33,300,000	6,700,000
12/31/23	40,000,000	($1,665*2,000 hrs) = 3,330,000	36,630,000	3,370,000
12/31/24	40,000,000	($1,665*2,000 hrs) = 3,330,000	39,960,000	40,000
Total		39,960,000

6) Depreciation rate using double declining balance = (1/Useful Life in years)*2

= (1/6 yrs)*2 = 0.333 i.e. 1/3

Depreciation Schedule using the Double Declining method (Amounts in $)

Date	Opening Book value (A)	Depreciation for the year (B = A*1/3)	Accumulated Depreciation (C)	Closing Book Value (A-C)
12/31/19	40,000,000	13,333,333	13,333,333	26,666,667
12/31/20	26,666,667	8,888,889	22,222,222	17,777,778
12/31/21	17,777,778	5,925,926	28,148,148	11,851,852
12/31/22	11,851,852	3,950,617	32,098,765	7,901,235
12/31/23	7,901,235	2,633,745	34,732,510	5,267,490
12/31/24	5,267,490	1,755,830	36,488,340	3,511,660
Total		36,488,340