A 2 kg block is pulled along a horizontal frictionless surface by a horizontal force of 8 N. What is the acceleration of the block?
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Correct answer
B. 4 m/s^2
Principle or equation
Newton's second law: F = ma.
Why this answer is correct
Given F = 8 N and m = 2 kg, a = F/m = 8/2 = 4 m/s^2.
Example
A 3 kg object under a 12 N force accelerates at 4 m/s^2.
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