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If the net force on an object were doubled while at the same time the mass of the object was halved,

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If the net force on an object were doubled while at the same time the mass of the object was halved, then the acceleration of the object is 

(A) 1/4 as great. 

(B) 1/2 as great. 

(C) 2 times greater. 

(D) 4 times greater. 

(E) unchanged 

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Correct option (D) 4 times greater

F = ma, if F is doubled, a is doubled. If m is halved, a will be doubled.

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