An object travels 15 m in 4 s and then another 16 m in 3 s. What is the average speed of the object?

Options

A. `5.17 ms^(-1)`
B. `4.43 ms^(-1)`
C. `5.00 s^(-1)`
D. `6.17 ms^(-1)`

Answer

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

### Step 1: Calculate the total distance traveled
The object travels two distances:
- First distance = 15 meters
- Second distance = 16 meters

Total distance traveled = First distance + Second distance
Total distance traveled = 15 m + 16 m = 31 m

### Step 2: Calculate the total time taken
The time taken for each distance is:
- Time for first distance = 4 seconds
- Time for second distance = 3 seconds

Total time taken = Time for first distance + Time for second distance
Total time taken = 4 s + 3 s = 7 s

### Step 3: Use the formula for average speed
The formula for average speed is:
Average Speed = Total Distance / Total Time

Substituting the values we calculated:
Average Speed = Total Distance (31 m) / Total Time (7 s)
Average Speed = 31 m / 7 s

### Step 4: Calculate the average speed
Now, we perform the division:
Average Speed = 4.43 m/s (approximately)

### Final Answer
The average speed of the object is approximately **4.43 meters per second**.

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