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which of the following is a contact force? a)gravity pulling a ball to the ground b) electrical charges attracting each other c) the weight of an object d)a car pulling a trailer
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which of the following is a contact force? a)gravity pulling a ball to the ground b) electrical charges attracting each other c) the weight of an object d)a car pulling a trailer

User Alessandro Santini
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d a car pulling a trailer
User Alessandrob
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