A block of wood of mass 5kg is pulled on a platform by a force of 40N as illustrated in the diagram above. If the frictional force, F experienced by the block is 12N, calculate the magnitude of the acceleration of the block?

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A. 2.4ms‾²
B. 5.6ms‾²
C. 8.0ms‾²
D. 2.4ms‾²

Correct Answer: Option B

B. 5.6ms‾²

Explanation

F + Ma = P

a = P−F/m

= 40−12/5 = 5.6ms‾²

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