AP Physics 1hardmcq1 pt
A ball of mass m hangs from a string in a car that accelerates forward at a (g = 10 m/s²). The string makes an angle with the vertical such that tanθ equals
A.a/g
B.g/a
C.ma/g
D.mg/a
Explanation
Core Concept
Horizontal balance T sinθ = ma and vertical T cosθ = mg divide to give tanθ = a/g.
Correct Answer
Aa/g
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