![]() Q4 : On a 120 km track, a train travels the first 30 km with a uniform speed of 30 km/h. ![]() (iv) No, displacement and distance are not equal as total distance covered by athlete is 800m while displacement is zero as athlete comes back to its initial position. ![]() (iii) Motion is non-uniform as the direction of motion of the athlete is changing while running on the track. (ii) As the athletes finish at the starting lineĭisplacement = final position-initial position = 0 (iv) Is the displacement of an athlete and the distance moved by him at the end of the race equal?Īns: (i) Total distance covered = 4 × 200m = 800 m (iii) Is the motion of the athlete's uniform or non-uniform. (ii) What is the displacement of the athletes when they touch the finish line? (i) What is the total distance to be covered by the athletes? Suppose the length of the track was 200 m Q3 : In a long-distance race the athletes were expected to take four rounds of the track such that the line of finish was the same as the line of start. (V av ) = Total distance/Total time taken Find the average speed and average velocity of Nisha.Īverage speed (V av ) = Total distance/Total time taken She covers 180m in one minute by swimming from one end to the other and back along the same straight path. Therefore, number of rounds in 140 m = 140/40 = 3.5Īfter every complete round, the farmer will be at the starting point, hence after 3.5 rounds farmer will be at the diagonal ends of the field. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds?Īns: Distance covered in one round = 40 m Q1: A farmer moves along the boundary of a square field of side 10 m in 40 s. Let us see some Solved Numericals of the chapter. This chapter covers the basic concepts of motion, including types of motion, distance, displacement, speed, velocity, and acceleration. The study of Class 9 Science Chapter Motion is an essential part of physics, as it helps us understand how objects move and the factors that affect their movement.
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