A collision is an isolated event in which……………..exert……………….on one another for……………… .

Explanation

To solve the question, we need to fill in the blanks in the given statement about collisions. Let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding the Context of a Collision**:
- A collision involves two or more objects interacting with each other. This interaction is typically brief and involves forces.

2. **Identifying the First Blank**:
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