Choose the wrong statement

Options

A. retardation is a vector quantity
B. accelaration due to gravity is a vector quantity
C. average speed is a vector quantity
D. displacement is a vector quantity

Answer

To solve the question of identifying the wrong statement among the given options, we need to analyze each statement carefully.

### Step 1: Understand the definitions
- **Retardation**: This is defined as negative acceleration, which occurs when an object is slowing down. It is indeed a vector quantity because it has both magnitude and direction.

### Step 2: Analyze the statements
1. **Retardation is a vector quantity**: This statement is true. As mentioned, retardation is negative acceleration and has direction.

2. **Acceleration due to gravity is a vector quantity**: This statement is also true. The acceleration due to gravity (g) acts downwards and has a magnitude of approximately 9.8 m/s².

3. **Average speed is a vector quantity**: This statement is false. Average speed is defined as the total distance traveled divided by the total time taken. Since distance is a scalar quantity, average speed is also a scalar quantity, not a vector quantity.

4. **Displacement is a vector quantity**: This statement is true. Displacement is defined as the shortest distance from the initial to the final position and has both magnitude and direction.

### Step 3: Identify the wrong statement
From the analysis, the only wrong statement is that "average speed is a vector quantity." Therefore, the correct answer to the question is that the wrong statement is the one about average speed.

### Final Answer:
The wrong statement is: **Average speed is a vector quantity.**

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