1 00:00:01,470 --> 00:00:05,100 Let's understand the average power calculation of any vehicle. 2 00:00:05,970 --> 00:00:07,740 This is the very state calculation. 3 00:00:09,330 --> 00:00:16,680 Average power calculation is average power required to achieve that acceleration rate acceleration rate 4 00:00:16,680 --> 00:00:23,550 is time required to attain a certain speed and all vehicle has that been paid mass? 5 00:00:24,060 --> 00:00:33,060 So we apply the simple projects and by calculating the work done and rhomberg then will calculate the 6 00:00:33,180 --> 00:00:33,680 power. 7 00:00:35,430 --> 00:00:42,870 So physically the vehicle is the mass and continued the weight of the vehicle as a 150 KAIJI. 8 00:00:43,680 --> 00:00:50,220 So because we are having the wheel arrangement, frictional losses, friction is very limited and due 9 00:00:50,220 --> 00:00:54,810 to the very small amount of force required to accelerate it. 10 00:00:55,050 --> 00:01:02,400 But we are not currently interested in force and dynamic equation, but we are only interested in calculating 11 00:01:02,400 --> 00:01:08,350 the average power calculation that will depend upon math as well as the acceleration rate. 12 00:01:08,730 --> 00:01:15,120 We know that that is one of the performance barometer of any vehicle. 13 00:01:16,510 --> 00:01:19,710 We must help exclusion rate. 14 00:01:20,080 --> 00:01:29,050 Let's follow the example we consider it's near, and second, to read the velocity of five meters per 15 00:01:29,050 --> 00:01:31,180 second notice given in meters per second. 16 00:01:31,770 --> 00:01:34,530 What is the calculation here? 17 00:01:34,540 --> 00:01:36,310 And waited 150 Kaiji. 18 00:01:36,550 --> 00:01:40,600 So is 150 cagy and a certain distance. 19 00:01:40,600 --> 00:01:43,140 But we are not interested in distance yet. 20 00:01:43,450 --> 00:01:47,320 What we are interested in, how much rising the velocity. 21 00:01:47,620 --> 00:01:55,210 So from the zero to five meters per second is the increase in velocity and it's take the 10 seconds. 22 00:01:55,210 --> 00:02:02,860 So we know that it is the acceleration rate then required to accelerate up to five meters per second 23 00:02:03,040 --> 00:02:09,220 speed so we can attain the speed of five meters per second from zero in 10 seconds. 24 00:02:12,920 --> 00:02:15,550 So we. 25 00:02:17,580 --> 00:02:26,120 Apply the physics math of 150 takes 10 seconds to read of five meters per second, M is equal to 150 26 00:02:26,430 --> 00:02:26,880 math. 27 00:02:27,120 --> 00:02:37,050 We can see that the velocity five meters per second and is d the quarter and second that we can calculate 28 00:02:37,050 --> 00:02:42,630 the well done and then work, then do it by the time will be our power average power. 29 00:02:43,080 --> 00:02:47,710 So what then is that equation one half and V squared. 30 00:02:48,210 --> 00:02:56,150 So M is the mass of Wakan 150 to in our case we is the velocity five meters per second. 31 00:02:56,550 --> 00:02:59,550 So it must be a meter per second and it must be cagy. 32 00:03:03,570 --> 00:03:09,930 They'll put the value of mass and velocity and time in this equation, I would be what then went up 33 00:03:09,930 --> 00:03:11,000 and the script went back. 34 00:03:11,940 --> 00:03:21,090 So if Mass have been cagy relative to 15 meters per second time, must mean second, then our final 35 00:03:21,090 --> 00:03:24,070 unit will become, what, ten meters per second? 36 00:03:24,090 --> 00:03:32,140 So when what is equal to one Newton per second or if to the unit of energy was then what, in two seconds 37 00:03:32,350 --> 00:03:35,390 when we got into intersection is equal to one Newton meter. 38 00:03:36,330 --> 00:03:39,820 So we put the value of m the square and time. 39 00:03:40,200 --> 00:03:48,450 So average power will calculate for the 150 K debate and this acceleration rate, it will become one 40 00:03:48,450 --> 00:03:50,260 eighty seven point five one. 41 00:03:51,510 --> 00:03:59,430 So this much mechanical minimum mechanical power is required to attain this acceleration rate for this 42 00:03:59,550 --> 00:04:00,080 mass. 43 00:04:00,540 --> 00:04:07,500 So we know the basic parameters of vehicle that is mass, basic performance parameter, acceleration 44 00:04:07,500 --> 00:04:11,590 rate of vehicle, and we can calculate the average power. 45 00:04:12,480 --> 00:04:17,950 Now, if in case of electric vehicle, the motor is supplying this power. 46 00:04:18,330 --> 00:04:23,940 So rating our rating of the motor must be higher than the one eighty five point seven what. 47 00:04:24,150 --> 00:04:30,720 So next higher our level rating of the motor that is available in market that can be used for this to 48 00:04:30,720 --> 00:04:32,110 achieve this performance. 49 00:04:32,220 --> 00:04:34,960 Select next higher rating motor from the available variant. 50 00:04:35,340 --> 00:04:39,440 And that is 125 watt of electric motor. 51 00:04:39,450 --> 00:04:44,190 If it is if it is a vehicle, then engine power is required. 52 00:04:44,490 --> 00:04:51,950 Output engine power must be higher than this to achieve this performance even. 53 00:04:51,970 --> 00:04:56,790 But this is a model output part of the world and electrical input. 54 00:04:56,790 --> 00:05:02,310 Motor power will be higher than this depending upon its efficiency losses. 55 00:05:05,510 --> 00:05:12,470 Take one more case now, we consider the 12, 13 kilometers per hour instead of meters per second, 56 00:05:12,830 --> 00:05:15,770 so we need to convert in meter per second. 57 00:05:15,770 --> 00:05:18,740 Part of the calculation in is 150 KAIJI. 58 00:05:19,220 --> 00:05:23,010 It's take 10 seconds to reach velocity of 30 kilometers per hour. 59 00:05:23,420 --> 00:05:26,000 So acceleration rate is given, is given. 60 00:05:26,990 --> 00:05:28,930 So M is equal to 150. 61 00:05:29,380 --> 00:05:34,630 Let's convert velocity from kilometer per hour to the meter per second. 62 00:05:35,030 --> 00:05:41,570 So 30 from the kilometer, one kilometer cycle, two thousand meter one are ridiculous and each minute 63 00:05:41,570 --> 00:05:43,240 is equal to 60 seconds. 64 00:05:43,280 --> 00:05:50,240 So by applying this will have the eight point three three meters per second velocity at 30 kilometers 65 00:05:50,240 --> 00:05:51,560 per hour speed. 66 00:05:52,690 --> 00:05:57,290 It is eight point three meters per second and time is 10 seconds. 67 00:05:59,340 --> 00:06:05,790 Let's calculate down at about one up and the square, Betty, and putting this all together, we will 68 00:06:05,790 --> 00:06:10,430 have average power output is equal to twenty point eighty three. 69 00:06:10,590 --> 00:06:12,340 What that means. 70 00:06:12,380 --> 00:06:17,730 It puts the electric vehicle very quite the motor power output, motor power higher than this one. 71 00:06:17,760 --> 00:06:25,650 So next higher is the 600 what model that means to achieve this execution date for this mass of the 72 00:06:25,650 --> 00:06:31,020 vehicle, we require the 600 watt electric motor. 73 00:06:31,650 --> 00:06:33,240 This is state calculation. 74 00:06:33,240 --> 00:06:40,440 We will see the dynamic calculation also for modeling, but the simple calculation can be helpful in 75 00:06:40,440 --> 00:06:41,430 some case. 76 00:06:42,590 --> 00:06:45,500 OK, you understand what the average power calculation of an. 77 00:06:49,420 --> 00:06:55,960 Time to exercise and train your mind, let's find out the time required for 20, 30 months to read the 78 00:06:55,960 --> 00:07:02,160 velocity of 50 km at 1:00 a.m., yet the power of motors given. 79 00:07:02,320 --> 00:07:05,730 You need to calculate the acceleration rate. 80 00:07:06,220 --> 00:07:12,380 So find out the time and calculate acceleration rate and share your answer with your remarks in comments 81 00:07:12,380 --> 00:07:12,670 section.