Question
1. Define uniform motion and provide a real-world example. Occars when an object pures at complicht speed 2. Explain the difference between distance and displacement. Distance is He foral legit of Her palk reweled 3. Describe how you can distinguish between speed and velocity using examples. 4. Why is displacement a vector quantity, but distance is a scalar quantity? 5. What kind of graph would I you expect for the velocity of an object in uniform motion? Part B: Numerical Problems 1. A car travels 240 km north in 4 hours. a) What is the speed of the car? - b) What is the velocity of the car? 2.A train moves at a constant speed of 80km/h for 3 hours. How far does it travel?
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MackenzieMaster · Tutor for 5 years
Answer
**Part A: Conceptual Questions**<br /><br />1. **Uniform motion** is defined as motion at a constant speed in a straight line. This means the object covers equal distances in equal intervals of time, and its direction doesn't change. A real-world example (though approximate) is a car traveling on a straight highway using cruise control. Another example is an ice skater gliding across the ice in a straight line at a constant speed after an initial push.<br /><br />2. **Distance** is the total length of the path traveled by an object. It's a scalar quantity, meaning it only has magnitude. **Displacement**, on the other hand, is the change in position of an object from its initial position to its final position. It's a vector quantity, meaning it has both magnitude and direction.<br /><br />3. **Speed** is the rate at which an object covers distance. It's a scalar quantity. **Velocity** is the rate at which an object changes its position. It's a vector quantity. For example, a car traveling at 60 km/h around a circular track has a constant speed but a changing velocity because its direction is constantly changing. A car traveling 60 km/h due north has both constant speed and constant velocity.<br /><br />4. **Displacement** is a vector quantity because it involves both magnitude (how far the object has moved from its starting point) and direction (the direction from the starting point to the ending point). **Distance** is a scalar quantity because it only considers the total length of the path traveled, regardless of the direction.<br /><br />5. The graph of velocity versus time for an object in uniform motion would be a **horizontal straight line**. This is because the velocity is constant, meaning it doesn't change over time.<br /><br /><br />**Part B: Numerical Problems**<br /><br />1. a) **Speed:** Speed = Distance / Time<br />Speed = 240 km / 4 hours<br />Speed = 60 km/h<br /><br /> b) **Velocity:** Since the car travels north in a straight line, the velocity is 60 km/h north.<br /><br />2. **Distance:** Distance = Speed × Time<br />Distance = 80 km/h × 3 hours<br />Distance = 240 km<br />
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