Prince kumar Chandwara , koderma, India 50 Questions 611 Answers 33 Best Answers 899 Points View Profile 3 Prince kumarExpert Asked: August 30, 20212021-08-30T13:37:17+00:00 2021-08-30T13:37:17+00:00In: Science A car runs at constant speed on a circular track of radius 100 m taking 62.8 s on each lap. What is the average speed and average velocity on each complete lap? (π=3.14) 3 (a) 10 m/s, 0 (b) 0, 0 (c) 0, 10m/s (d) 10m/s, 10m/s motionphysics Share Facebook 2 Answers Voted Oldest Recent Shrestha India 27 Questions 41 Answers 19 Best Answers 1,388 Points View Profile Best Answer Shrestha Guru 2021-08-31T11:48:32+00:00Added an answer on August 31, 2021 at 11:48 am Correct answer is option (a) average speed = 10 m/s & average velocity = 0 Explanation: Radius, r = 100 m Circumference = 2πr = 2 × 3.14 × 100 = 628 m Time taken to cover one round = t = 62.8 s Average Speed = 2πr/t = 628/62.8 = 10 m/s Since, initial & final positions are same after completing 1 round. So, displacement = 0 Therefore, average velocity = displacement/t = 0/6.28 = 0 m/s 2 Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Prince kumar Chandwara , koderma, India 50 Questions 611 Answers 33 Best Answers 899 Points View Profile Prince kumar Expert 2021-08-30T13:48:32+00:00Added an answer on August 30, 2021 at 1:48 pm Velocity zero, speed 10 m/s Radius of lap = 100m Circumference =2πR=200π=628m time taken to cover one lap = 62.8s Hence average speed =62.8628=10ms−1 Average velocity = 0 as the inital and final positions are same (after completing a lap) (displacement = 0) Hence option B is correct. 0 Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp You must login to add an answer. Username or email* Password* Remember Me! Forgot Password?