Physics Class 9 Practical 10 Important Viva Questions with Answers (principle of moments)

PRACTICAL 10

To verify the principle of moments by using a metre rod balanced on a wedge.

VIVA VOCE

1.  What is the objective of this experiment?
   Ans: The objective is to verify the principle of moments by using a meter rod balanced on a wedge.

2. Explain the principle of moments.
   Ans: The principle of moments states that for an object to be in equilibrium, the sum of the clockwise moments about any point must be equal to the sum of the anticlockwise moments about the same point.

3.  How will you set up the experiment?
   Ans: Place the meter rod horizontally on a wedge and adjust the position of weights along the rod until it is balanced. 

4. What equipment do you need for this experiment?
   Ans: You will need a meter rod, a wedge, weights, and a balance.

5. Why is it important to ensure the meter rod is balanced?
   Ans: Balancing the meter rod ensures that the principle of moments can be accurately demonstrated, showing that the clockwise and anticlockwise moments are equal.

6. How will you measure the distances from the pivot point to the weights?
   Ans: Use a measuring tape or ruler to measure the distances from the pivot point (fulcrum) to the positions where the weights are placed along the meter rod.

7.  What will you vary in the experiment?
   Ans: We will vary the positions and weights of the masses along the meter rod while keeping the fulcrum fixed on the wedge.

8. How will you calculate the moments in this experiment?
   Ans: The moment of a force is calculated by multiplying the force by the perpendicular distance from the pivot point to the line of action of the force.

9.  How will you know when the meter rod is in equilibrium?
   Ans: The meter rod will be in equilibrium when it remains stationary without any rotational motion, indicating that the clockwise and anticlockwise moments are balanced.

10.  What conclusions can be drawn from this experiment?
   Ans: This experiment demonstrates that the principle of moments holds true, as the meter rod remains balanced when the clockwise and anticlockwise moments are equal. It validates the fundamental concept of rotational equilibrium.

Comments

Post a Comment

Popular posts from this blog

The Old (Ancient) Names of Peshawar: A Journey Through History

Image
Peshawar, a vibrant city nestled in the northwest of Pakistan, boasts a rich and diverse history. Its roots trace back to antiquity, making it one of the oldest continuously inhabited cities in the world. Throughout the ages, Peshawar has been known by different names, each reflecting its historical significance and cultural evolution. In this blog post, we'll take a journey through time to explore the ancient names of Peshawar and how they connect to the city's storied past. 1. Purushapura - The Early Beginnings: Purushapura is one of the earliest known names of Peshawar. It dates back to the period of the ancient Indian civilization and was used by the Indo-Greek kings who ruled the region. This name signifies Peshawar's ancient origins and its importance as a hub of trade and culture in the ancient world. 2. Vaehka - Under the Achaemenid Empire: During the reign of the Achaemenid Empire, the city was known as Vaehka. This name reflects the city's role as part of the
Read more

Police Issue Warning to Android Phone Users Regarding Unintentional 999 Calls Caused by New Feature

Image
  Police forces across the UK have raised concerns about a recent feature found on certain Android phones, which is leading to a significant influx of unintended and "silent" 999 emergency calls overwhelming emergency switchboards. The problematic feature, known as Emergency SOS , is triggered when users repeatedly press the side button on their phones. Police officials believe that this feature is partly responsible for the escalating number of emergency calls being made. Google, the developer of the widely used Android phone software, has stated that it expects phone manufacturers to release updates addressing this issue. Popular smartphone models such as Samsung's Galaxy, Google's Pixel, and OnePlus devices are among those running on the Android operating system. The National Police Chiefs Council explained that the recent Android software update introduced a new SOS emergency function that allows devices to call 999 by pressing the power button five times or mor
Read more

What goes around comes around (Essay 250 words)

Image
This saying, "what goes around comes around," is like a golden rule for life. It means that the things we do have a way of coming back to us. ". Our actions have consequences, and it encourages us to be good, work hard, and believe that things will turn out well if we do the right things. Imagine it's like planting seeds; if we plant good seeds by being kind, helpful, and respectful to others, those seeds will grow into positive experiences and relationships in the future. On the other hand, if we plant bad seeds by being mean or dishonest, we'll likely harvest negativity and problems later on. In our everyday experiences, we can see this principle in action. When we smile at someone, they often smile back. When we lend a helping hand, others are more likely to help us when we need it. It's a reminder that the world tends to reflect our actions and attitudes. Moreover, this saying also motivates us to keep going, even when things are tough. It reminds
Read more