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If the power of the car is 75 kW and the resistance is one tenth of the weight of the car, (g = 10 N / kg), the following formula can be obtained: 1 traction of the car 2 distance of the car in one minute What is traction? How to calculate it?
Because driving at a constant speed, the traction is equal to the friction force. The gravity of the car is 50000 n, the friction resistance is 50000 * 1 / 10 = 5000 n, so the traction force is 5000 n, and because f traction * V = P, so v = P / F = 15 m / s, one minute is 60 s, driving 900 M
One kilowatt of electricity can make a 40 watt bulb light for 25.1 hours. How many hours can 2.4 kilowatt hours make such a bulb light?
1KWh=1000Wh
1000Wh/40w=25h
2.4KWh/40W=60h
A: it can be on for 60 hours
One kilowatt hour electricity can make 45 watt fluorescent lamp illuminate 22.22 hours. How many hours can 6.8 kilowatt hour electricity make it illuminate?
22.22 × 6.8 = 151.096 (hours)
How many cards is 1000? What's the big card? What's the relationship among the three?
1 kcal is 1000 kcal, and a large kcal is 1000 kcal
How much is 60 kcal
A Panpan French bun 20g is 60 calories. How many calories is that
1 kcal is 1000 kcal, and a large kcal is 1000 kcal
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- 13. A hydrogen fueled vehicle with mass of M = 2000kg and rated output power of 80kW is always blocked by 0.1 times of the vehicle weight when driving on a straight road. If the vehicle starts from standstill with uniform acceleration, the acceleration is a = 1m / S ^ 2. After reaching the rated output power, the vehicle keeps the power unchanged and accelerates for 800m, The results are as follows: (1) the maximum driving speed of the car; (2) the speed at the end of the starting phase of the car with uniform acceleration; (3) the instantaneous power of the car's traction force when the speed is 5m / S; (4) the acceleration when the speed is 32m / S; (5) the time taken for the car to reach the maximum driving speed from standstill
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