Physics Class 9 Practical 4 Important Viva Questions with Answers (Angle Iron)

 PRACTICAL 4

To find the acceleration of a ball rolling down an angle iron by drawing a graph between 2S and T2

VIVA VOCE

1. How do you set up the experiment to find the acceleration of a ball rolling down an angle iron?

Ans: Place the angle iron on a smooth surface, ensuring it is securely fixed. Release the ball from the top of the angle iron and measure the time it takes to travel a known distance.

2. What is the purpose of drawing a graph between \( 2S \) and \( T^2 \)?

Ans: The purpose is to determine the acceleration of the ball by analyzing the relationship between the square of the time taken (\( T^2 \)) and twice the distance traveled (\( 2S \)).

3. How do you measure the distance traveled by the ball (S)?

Ans: Measure the horizontal distance covered by the ball from its starting point to its final position.

4. How do you measure the time taken by the ball (T)?

Ans: Use a stopwatch or a similar device to measure the time it takes for the ball to travel the known distance along the angle iron.

5. What data points are plotted on the graph?

 Ans: The distance traveled (\( S \)) along the x-axis and the square of the time taken (\( T^2 \)) along the y-axis.

6. What does the slope of the graph represent?

Ans: The slope of the graph represents the acceleration of the ball.

7. What precautions should be taken during the experiment to ensure accurate results?

Ans: Ensure the angle iron is securely fixed, use a smooth surface, minimize air resistance, and repeat the experiment multiple times for accuracy.

8. How would you interpret the graph to determine the acceleration of the ball?

Ans: By analyzing the slope of the graph, as it represents the acceleration according to the equation \( a = \frac{2S}{T^2} \).

9. What factors could introduce errors into the experiment, and how would you mitigate them?

Ans: Errors could arise from inaccurate measurements of distance or time, air resistance, or uneven surface. Minimize errors by using precise instruments, repeating the experiment, and ensuring a controlled environment.

10.How would you validate the results obtained from the graph?

Ans: Validate results by comparing them with theoretical calculations or by conducting similar experiments under different conditions to ensure consistency.