A car travels 30 m toward east, then it takes turn and travels 40 m towards north. It takes 50 seconds. Its average velocity is: ....
Correct answer: B. 1 m/s
- A. 7/5 m/s
- B. 1 m/s
- C. 1/5 m/s
- D. 5 m/s
Explanation
To calculate average velocity, we need to divide the total displacement by the total time taken. The car travels 30 m toward the east, and then it turns and travels 40 m toward the north. Since these displacements are at right angles to each other, we can find the total displacement using the Pythagorean theorem. Total displacement = √(302 + 402) = √(900 + 1600) = √2500 = 50 m The total time taken is given as 50 seconds. Average velocity = Total displacement / Total time taken = 50 m / 50 s = 1 m/s Therefore, the average velocity of the car is 1 m/s.
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