Calculate the velocity … A racing car has a uniform acceleration of 4 m s-2. (d) the distance that object B has covered at the point where it passes C is equal to 9 graph units. Explain why chloroplasts are found only in plant cells? All the solutions are in updated form for current academic session 2020-21. The signal travels at the … The first graph describes uniform motion and the second one describes non-uniform motion. Question 2. 4 Class 8 Science Important Questions for 2020-21; 5 Class 8 Science Multiple Choice Questions (MCQ ) 2020-21; ... All the answers are done properly under the guidance of subject experts. Neither of the statements are true. Now, the total displacement of the farmer depends on the initial position. 2. Answer: (b) Question 3. Distinguish between speed and velocity. 8.12. Therefore the car travels a total of 12 meters in the first four seconds. Extra Questions for Class 9 Science Chapter 8 Motion with Answers Solutions. 1. 5. Therefore, the ball reaches the ground after 2 seconds. (c) since there are 7 unit areas of the graph between 0 and 4 on the Y axis, 1 graph unit equals 4/7 km. (b) Its magnitude is greater than the distance travelled by the object. 3. This speed-time graph can be plotted as follows. This is where the class 9 science chapter 8 NCERT solutions pdf might be of help. This solution contains questions, answers, images, step by step explanations of the complete Chapter 8 titled Motion of Science taught in class 9. These questions are solved by our expert Science teachers so that you get an idea of how to write answers in exams. Therefore, the first car (which was traveling at 52 kmph) traveled farther post the application of brakes. 9. Since average speed is the total distance traveled in a time frame and velocity is the total displacement in the time frame, the magnitude of average velocity and average speed will be the same when the total distance traveled is equal to the displacement. The odometer measures the total distance travelled by automobile. NCERT Solutions for Class 9 explain motion in terms of distance moved or the displacement. 4. Page No: 100. Question 9. If yes, support your answer with an example. An object has moved through a distance. 3. Download Class 9 Science App in Hindi and English Medium for offline use. Answer: Galileo Galilei and Isaac Newton. Are rest […] (a) since the slope of line B is the greatest, B is traveling at the fastest speed. A stone is thrown in a vertically upward direction with a velocity of 5 m s-1. Question 10. Have a glance at the MCQ of Chapter 6 Science Class 8 and cross-check your answers during preparation. However, when it reaches its maximum height, its velocity is zero. What was the distance of the spaceship from the ground station? Page No: 100. What distance will it cover in 10 s after start? In Class 8 Science Chapter 9, we will study about the mode of reproductions like Sexual Reproduction and Asexual Reproduction. (b) Are all three ever at the same point on the road? These solutions will be useful … It helps students understand uniform and non-uniform motion. A bus decreases its speed from 80 km h–1 to 60 km h–1 in 5 s. Find the acceleration of the bus. Therefore, the net distance covered by the athlete is 2200 meters and the total displacement of the athlete is 200m. Class 8 Science Chapter 8 Important Questions for Practice. This solution for Class 8 Science Chapter 8 has answers to all the questions present in Chapter 8. 2. Since there is no change in the velocity of the object (Y-Axis value) at any point of time (X-axis value), the object is said to be in uniform motion. 2. Students can download NCERT class 9 science ch 8 solutions from Vedantu for free. Question from very important topics are covered by NCERT Exemplar Class 9.. You also get idea about the type of questions and method to answer in your Class 9th examination. 1. Given, the car is initially at rest; initial velocity (u) = 0 ms-1, As per the second motion equation, s = ut+1/2 at2, Therefore, the total distance covered by the car (s) = 0 * 10m + 1/2 (4ms-2)(10s)2. A driver of a car travelling at 52 km h–1 applies the brakes and accelerates uniformly in the opposite direction. The first part of the syllabus consists of chapter 1: matters in our surroundings, chapter 2: Is matter around us pure, chapter 3: atoms and molecules, chapter 4: structure of the atoms, chapter 5: the fundamental unit of life, chapter 6: tissues and chapter 7: diversity in living organisms. To produce a uniform acceleration of 4 m s-2 for 2 minutes our different... Passes a make students aware of Topics 42250 km Science with Answers Solutions straight.! C travelled when b passes a class 9 science chapter 8 questions and answers velocity … check the below NCERT Questions... 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