Motion and Measurement of Distances

Which of the following 20th-century transportation advancements allowed for faster travel over long distances?

Why might using a 'gilli' and 'danda' not be a reliable method for standard measurement?

In the context of measuring distances, what is the primary reason for needing a standardized unit of measurement?

What is the most likely reason that old modes of transport are no longer in use today?

When deciding whether to walk, take a bus, or use a spacecraft, what factor is most important in making that choice?

Based on the text, which of the following is the earliest mode of transport mentioned?

Paheli and Boojho used a 'danda' and 'gilli' to measure their desk. What problem did they encounter when they lost their original set?

Why is knowing the distance to a place important before traveling there?

Why might using a cricket wicket and bails to measure the desk length create a similar problem to using the gilli and danda?

What is the most accurate way for Paheli and Boojho to resolve their dispute about desk space, based on the need for a standardized measurement?

Why is it important for a tailor to accurately measure cloth before stitching a kurta?

A farmer needs to determine the area of their land. Why is this measurement crucial for effective farming?

If Paheli and Boojho fold the string into 8 equal sections, what fraction of the total string length does each section represent?

A carpenter is planning to build a cupboard door. Why does the carpenter need to measure the height and width?

Imagine you are measuring the length of your room using a string. After laying the string three times, there's a small gap left. What is best way to measure the fractional length?

What is the main reason for using standard units of measurement instead of non-standard units like 'gilli' and 'danda'?

A point marked on the blade of a rotating fan maintains a constant distance from the center. What type of motion does this exemplify?

Which of the following conditions is essential for a motion to be classified as periodic?

A simple pendulum is set in motion. Which of the following best describes its movement pattern?

Consider a sewing machine in operation. Which part undergoes periodic motion?

A ball rolls on the ground. What type of motion is it experiencing?

A guitar string vibrates when plucked. What kind of motion is this?

How does the motion of a swing best exemplify periodic motion?

Considering the examples of periodic motion, which characteristic is common among them all?

Why is using body parts as units of length, like the forearm for garlands, not a reliable standard?

A tailor uses a measuring tape and a cloth merchant uses a metre rod. Why can't the tailor use a metre rod and the cloth merchant use a measuring tape?

When measuring the length of a small object with a scale, what should you do if the zero mark on the scale is not clear due to a broken edge?

What is the most important factor to consider when choosing a measuring device for a specific task?

A student is measuring the length of a pencil using a 15 cm scale. One end of the pencil is at the 2.0 cm mark, and the other end is at the 14.8 cm mark. What is the length of the pencil?

Why is it important to place the scale directly in contact with the object being measured?

A student needs to measure the girth of a cylindrical tree trunk. Which measuring device is most suitable for this task?

What is the primary reason for using standardized units of measurement, such as the meter, instead of relying on body parts?

Which of the following scenarios exemplifies an object undergoing both rectilinear and rotational motion?

Why was it necessary to develop a uniform system of measurement, like the International System of Units (SI)?

A student measures the length of a table using their hand span. What is the most significant limitation of using hand spans as a unit of measurement?

What characteristic defines periodic motion?

Convert 8.5 kilometers into meters.

Which of the following is an example of rectilinear motion?

A pendulum swings back and forth. What type of motion does this represent?

What is the primary reason that using paces or footsteps is not a reliable standard unit of length?

Why is it important to use standard units and devices when measuring distances?

In Activity 5, how do you distinguish between objects at rest and objects in motion?

What is the purpose of marking the ant's position on the paper in Activity 6?

What does connecting the marked points with arrows signify in Activity 6?

Which of the following is a key observation derived from the examples of motion?

Why is careful attention to measurement important when studying motion?

Considering the examples provided (a flying bird, the second's hand of a clock), what is a common characteristic of objects in motion?

In the context of studying the motion of an ant, what does marking the ant's positions at short intervals enable you to understand?