alleryA 10 kg block on a frictionless surface is pulled by 20 N horizontally and 20 N at 60° above horizontal. The horizontal acceleration is
A2 m/s²
B1 m/s²
C3 m/s²
D4 m/s²
Answer & Solution
Correct answer: C. 3 m/s²
Horizontal force = 20 + 20·cos60° = 20 + 10 = 30 N. a = 30/10 = 3 m/s².
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