This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
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Here are the answers to your questions. 6. What is the difference between uniform and non-uniform motion? In uniform motion, an object covers equal distances in equal intervals of time, meaning its speed remains constant. In non-uniform motion, an object covers unequal distances in equal intervals of time, meaning its speed changes (it accelerates or decelerates). 7. A truck travels 540 km, in 4.5 hrs. Find the speed of truck. Step 1: Identify the given values. Distance (D) = 540 km Time (T) = 4.5 hrs Step 2: Use the formula for speed. Speed = DistanceTime Step 3: Substitute the values and calculate the speed. Speed = 540 km4.5 hrs Speed = 120 kmhr The speed of the truck is 120 km/hr. 8. How does a sand clock work? A sand clock, or hourglass, works by using gravity to measure time. It consists of two glass bulbs connected vertically by a narrow neck. Fine sand flows from the upper bulb to the lower bulb through this neck at a relatively constant rate, and the total amount of sand is calibrated to flow completely in a specific duration, such as one hour. 3 done, 2 left today. You're making progress.