Practice Questions

<p>Contrast the function of a speedometer and an odometer in a vehicle.</p>

<p>Identify the SI unit of time and its symbol.</p>

<p>Name the instrument in vehicles that measures and displays the vehicle&#39;s speed.</p>

<p>Apply the formula for speed to determine the distance covered by a cyclist riding at a speed of 12 $\text{m/s}$ for 15 seconds.</p>

<p>Demonstrate how to calculate the speed of a bicycle that travels a distance of 100 meters in 25 seconds. Express the answer in meters per second ($\text{m/s}$).</p>

<p>Examine the data provided and determine if the motion of the object is uniform or non-uniform: In the first 2 seconds, it travels 10 meters, and in the next 2 seconds, it travels 15 meters.</p>

<p>Define the term &#39;time period&#39; as it relates to a simple pendulum.</p>

<p>List four ancient devices used for measuring time.</p>

<p>Describe how a sundial measures time.</p>

<p>Compare and contrast uniform and non-uniform motion. Give one example of each type of motion observed in daily life.</p>

<p>What is the function of an odometer in a vehicle?</p>

<p>A train travels 240 kilometers in 3 hours. Calculate its average speed in kilometers per hour ($\text{km/h}$).</p>

<p>Calculate the distance a car will travel in 4 hours if it maintains a constant speed of 75 $\text{km/h}$.</p>

<p>A pendulum completes 20 oscillations in 40 seconds. Calculate the time period of the pendulum.</p>

<p>Recall the formula for calculating speed.</p>

<p>Critique the design of a traditional hourglass as a reliable timekeeping device. Discuss its limitations and suggest improvements.</p>

<p>Explain the difference between uniform and non-uniform linear motion.</p>

<p>A bicycle travels 100 meters in 20 seconds. Calculate its speed.</p>

<p>Explain why uniform linear motion is considered an idealization.</p>

<p>Analyze how the length of a simple pendulum affects its time period. If the length of the pendulum is quadrupled, how will the time period change?</p>

<p>Solve for the time it takes for a car traveling at a constant speed of 60 $\text{km/h}$ to cover a distance of 300 kilometers.</p>

<p>Describe what is meant by &#39;average speed&#39;.</p>

<p>Describe the motion of a simple pendulum.</p>

<p>A train travels at a speed of $60 \text{ km/h}$ for 2 hours. Calculate the distance it covers.</p>

<p>Apply the concept of average speed to determine which runner is faster: Runner A completes 400 meters in 60 seconds, while Runner B completes 200 meters in 25 seconds.</p>

<p>Solve for the average speed of a train that travels 120 km in the first hour, 150 km in the second hour, and 90 km in the third hour.</p>

<p>List the factors on which the time period of a simple pendulum depends.</p>

<p>A car travels at 30 $\text{m/s}$ for 10 minutes and then at 20 $\text{m/s}$ for the next 10 minutes. Calculate the total distance covered by the car.</p>

<p>Summarize how a water clock measures time.</p>

<p>Demonstrate the conversion of speed from kilometers per hour ($\text{km/h}$) to meters per second ($\text{m/s}$). Convert 72 $\text{km/h}$ to $\text{m/s}$.</p>

<p>Evaluate the effectiveness of using a stopwatch to measure the time period of a single oscillation of a pendulum versus measuring the time for 20 oscillations and then dividing by 20. Justify your answer.</p>

<p>Formulate a method to determine whether a cyclist is moving with uniform or non-uniform motion on a straight road using only a stopwatch and markers placed at equal intervals along the road.</p>

<p>Evaluate the accuracy of using a homemade water clock constructed from a plastic bottle (as described in Activity 8.1) compared to a digital stopwatch for measuring a 5-minute interval. Justify your evaluation based on potential sources of error.</p>

<p>Justify the use of SI units (meters and seconds) for measuring speed in scientific experiments. Explain why these units are preferred over other units like kilometers per hour or miles per hour.</p>

<p>A car travels $120$ km in $2$ hours. The first $60$ km is covered at a uniform speed of $40 \text{ km/h}$. Propose a plan to calculate the speed for the remaining $60$ km.</p>

<p>Critique the statement: &#39;A faster object always covers more distance than a slower object.&#39; Provide a scenario where this statement is false and explain why.</p>

<p>Formulate an argument explaining why understanding uniform and non-uniform motion is important in designing safer transportation systems.</p>

<p>Formulate a method to determine the average speed of a toy car traveling down a ramp using a stopwatch and a measuring tape. Describe the steps involved and how you would calculate the average speed.</p>

<p>Design a simple experiment to demonstrate that the time period of a simple pendulum is independent of the mass of the bob, keeping the length constant. Include the materials required, procedure, and expected results.</p>

<p>Design an experiment to investigate how the angle of release of a pendulum affects its time period. Include a detailed procedure, list of materials, and expected results.</p>

<p>Propose a modification to the design of the sinking bowl water clock (Ghatika-yantra) to improve its accuracy. Explain the scientific reasoning behind your proposed modification.</p>

<p>Analyze the motion of a car that covers the first half of a journey at 40 $\text{km/h}$ and the second half at 60 $\text{km/h}$. Is the average speed simply the average of 40 and 60? Explain why or why not.</p>

<p>Propose a design for a device that could measure the speed of a bicycle in real-time and display it to the rider. Consider the components needed, how they would work together, and potential challenges.</p>

<p>Evaluate the claim that atomic clocks are the most accurate timekeeping devices. Justify your answer by comparing their accuracy to that of pendulum clocks and quartz clocks.</p>

<p>A train travels from City A to City B, a distance of $400$ km. It travels at $80 \text{ km/h}$ for the first $200$ km and then at $100 \text{ km/h}$ for the next $100$ km. Evaluate if the train can cover the remaining $100$ km in 45 minutes to reach city B on time.</p>