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1.A particle moves at a constant speed in circular path. is it accelerated? give reasons
2.A girl standing from a point walks in a circular park of radius 70 m and comes back to the same point. Is the distance covered and the displacement,the same? Justify.
3.Observe the following motions and classify them as uniform motion,non-uniform motion and circular motion.Motion of a football player, motion of a fan, motion of a town bus,motion of the moon,motion of spectators in an auditorium, motion of the arms in a clock.
4.find the displacement of a car which increases its speed from 20m/s to 80m/s in 12 seconds
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1. no. it is not accelerating. as the question says constant speed irrespective of path. acceleration is zero as the speed remains constant. p.s. acceleration is rate of change of velocity/speed with respect to time.
2. no. the distance is 70 m while displacement is zero. distance is the total path covered while. displacement can be defined as the shortest (perpenticular/straight line) distance between starting point and final point
3. f. player- non u, fan - non u, bus- non u, moon-u, pectators -non-u, clock- u
4. 80-20=60m/s .. so dispacement 60 *12 = 720m
2. no. the distance is 70 m while displacement is zero. distance is the total path covered while. displacement can be defined as the shortest (perpenticular/straight line) distance between starting point and final point
3. f. player- non u, fan - non u, bus- non u, moon-u, pectators -non-u, clock- u
4. 80-20=60m/s .. so dispacement 60 *12 = 720m
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