 hi guys good morning so here's the solution for yesterday's question of the day 300321 here is a question and an athlete on the call of go the get set and go starts with an acceleration of 10 meter per second square and gained his maximum speed in five seconds so i can say that the maximum speed is equals to u plus a 50 meter per second is big then continue with the same speed he finishes the race in another three seconds okay so i'll just so total time the race he ran is for eight seconds yes or no five plus three the displacement covered in five second will be s 0 to 5 is equals to ut 0 plus half 10 t square coming out to be 125 meters whereas the displacement covered in last three seconds is no acceleration right or continues with the same speed speed into time so 150 so the total length of the track right or not is 75 meters good next oh what is the length of the track is a question oh wow i was like post crossing the finish line he slows down to come to rest in another 10 seconds fine so final velocity is 0 initial velocity is a 50 at the time of crossing the finish line we do not know a but it has to be negative because it is retardation slowing down okay okay and time is another 10 seconds okay so the acceleration is negative five meter per second square good what with what speed has he crossed the finish line very easy 50 meter per second if this whole happened in a complete circle from what is the radius of the circle hang shabash shabash shabash oh wow boss under boss but i'll tell you what you have to tell tell the total displacement so including this part beta s is equals to ut 50 s is equals to ut 50 into 10 minus half at square okay so this is 500 minus this is yes or no 250 so coming out to be 250 so please understand the total distance covered okay in a circular order the total distance covered is 275 plus 250 coming out to be yes or no shop 0 is 5 okay 7 or 5 though a 525 this 525 has to be a circle is equals to 2 pi r so the radius of the circle had to be 525 upon 2 into 22 by 7 okay okay so now if you want you can solve it if you do not want you do not solve it but there isn't any answer you have to respond okay clear so i'll take it up as 83.51 centimeter not centimeter radius we generally calculate okay so is the radius of the circle if this would have happened in a circular track got it clear no doubt very good