An object moves 10 m in 4 s then turns left and moves 20 m in next 5 s. What is the average speed of the object?

Options

A. `10 m/s`
B. `(10)/3 m/s`
C. `(20)/3 m/s`
D. `4.5 m/s`

Answer

To find the average speed of the object, we will follow these steps:

### Step 1: Calculate the total distance traveled
The object moves 10 meters in the first segment and then 20 meters in the second segment.

Total distance = Distance in first segment + Distance in second segment
Total distance = 10 m + 20 m = 30 m

### Step 2: Calculate the total time taken
The time taken for the first segment is 4 seconds and for the second segment is 5 seconds.

Total time = Time in first segment + Time in second segment
Total time = 4 s + 5 s = 9 s

### Step 3: Calculate the average speed
Average speed is calculated using the formula:
Average speed = Total distance / Total time

Substituting the values we found:
Average speed = 30 m / 9 s = 10/3 m/s

### Final Answer
The average speed of the object is \( \frac{10}{3} \) m/s or approximately 3.33 m/s.

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