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The acceleration of the system show above is

Physics
JAMB 1995

The acceleration of the system show above is

  • A. 2ms-2
  • B. 4ms-2
  • C. 6ms-2
  • D. 8ms-2
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Correct Answer: Option B
Explanation

M\(_2\)g - M\(_2\)a = M\(_1\)a + M\(_1\)g Sin\(\theta\)

(30 x 10) - 30a = 20a + 20 x 10 x Sin 30

300 - 30a = 20a + 100

- 30a - 20a = 100 - 300

- 50a = - 200

a = \(\frac{-200}{-50}\) = 4m/s\(^2\)


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