A rock is placed on a table and is motionless and not touched by an outside force. The rock will most likely remain motionless because...
Understand the Problem
The question is asking why a rock on a table remains motionless when not influenced by an outside force. The possible answers provide different explanations based on the concepts of balanced and unbalanced forces.
Answer
Balanced forces exerted by gravity and the table keep the rock motionless.
The final answer is balanced forces exerted by gravity and the table keep the rock motionless.
Answer for screen readers
The final answer is balanced forces exerted by gravity and the table keep the rock motionless.
More Information
According to Newton's First Law, an object at rest will remain at rest unless acted upon by an unbalanced force. In this case, the rock remains motionless due to balanced forces.
Tips
A common mistake is thinking that gravity alone keeps the rock motionless without considering the upward force from the table.
Sources
- Newton's Laws and Balanced Forces Review - quizizz.com
- Newton's laws of motion (article) | Forces - Khan Academy - khanacademy.org
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