Question

An object travels 25 m in 5 s and then travels 25 m in 3 s. What is the average speed of the object?

• A. \( 4.25 \, \text{m/s}^{-1} \)
• B. \( 5.25 \, \text{m/s}^{-1} \)
• C. \( 6.25 \, \text{m/s}^{-1} \)
• D. \( 5.33 \, \text{m/s}^{-1} \)

Hint:

To find the average speed, always divide the total distance by the total time. Keep in mind that the total time and distance are independent of how the object moves during each part of the journey.

Answer 1

The Correct Option is C

Average speed is calculated as the total distance traveled divided by the total time taken. Given: \[ \text{Distance}_1 = 25 \, \text{m}, \quad \text{Time}_1 = 5 \, \text{s} \] \[ \text{Distance}_2 = 25 \, \text{m}, \quad \text{Time}_2 = 3 \, \text{s} \] 1. Total Distance: \[ 25 \, \text{m} + 25 \, \text{m} = 50 \, \text{m} \] 2. Total Time: \[ 5 \, \text{s} + 3 \, \text{s} = 8 \, \text{s} \] 3. Average Speed: \[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} = \frac{50 \, \text{m}}{8 \, \text{s}} = 6.25 \, \text{m/s} \] Final Answer \[ \boxed{6.25 \, \text{m/s}} \]