A car with a mass of 4.0 * 10 to the power of 3 kg, a car with a static starting force of 6.0 * 10 to the power of 3, and a car with a resistance of 4.0 * 10 to the power of 3 For a car with a mass of 4.0 * 10 to the power of 3 kg, the traction of the car is 6.0 * 10 to the power of 3, and the resistance is 4.0 * 10 to the power of 3. Calculate the acceleration of the car and the speed at the end of 20 seconds A ⊥ 244 [1 / 2] what is the background of the signing of the Treaty of Shimonoseki? What are the impacts on the nature of Chinese society? What is the historical significance of listing two important battles during the Anti Japanese war? What are the necessary conditions for Cameron to become British Prime Minister? To whom should the new cabinet headed by him be responsible? Summarize the influence of British bourgeois representative system on British history and answer in order!

A car with a mass of 4.0 * 10 to the power of 3 kg, a car with a static starting force of 6.0 * 10 to the power of 3, and a car with a resistance of 4.0 * 10 to the power of 3 For a car with a mass of 4.0 * 10 to the power of 3 kg, the traction of the car is 6.0 * 10 to the power of 3, and the resistance is 4.0 * 10 to the power of 3. Calculate the acceleration of the car and the speed at the end of 20 seconds A ⊥ 244 [1 / 2] what is the background of the signing of the Treaty of Shimonoseki? What are the impacts on the nature of Chinese society? What is the historical significance of listing two important battles during the Anti Japanese war? What are the necessary conditions for Cameron to become British Prime Minister? To whom should the new cabinet headed by him be responsible? Summarize the influence of British bourgeois representative system on British history and answer in order!

F = 6.0 * 10 & sup3; n
F resistance = 4.0 * 10 & sup3; n
M=4.0*10³kg
F drag-f drag = ma
A = (f traction - f resistance) / M = (6.0 * 10 & sup3; - 4.0 * 10 & sup3;) / 4.0 * 10 & sup3; = 0.5 (M / S & sup2;)
V0=0
V=V0+at=at=0.5*20=10(m/s)
A: the acceleration of the car is 0.5 m / S & sup2;, and the speed at the end of 20 seconds is 10 m / s

The rated power of a certain type of automobile engine is 6 times 10 to the fourth power W. when driving at cloud speed on horizontal road, the resistance is 1800n,
When the car runs at a constant speed
The amount of traction provided by the engine
The size of the driving speed
Work done by traction after driving for 5 minutes

(1) Because it is driving at a constant speed, the traction is equal to the resistance, f = f = 1800n
(2) Driving speed v = P / F = 60000w / 1800n = 33.3m/s
(3) W=Pt=60000W*5*60s=18000 000J

The rated power of a certain type of automobile engine is 6 × 104w, and the resistance is 2000N when driving at a constant speed on the horizontal road. Under the rated power, when the automobile is driving at a constant speed, the following requirements should be obtained: (1) the traction force provided by the engine; (2) the work done by the traction force after driving for 5min; (3) the driving speed

(1) Because the car runs at a constant speed, it is affected by the balance force; from the knowledge of two force balance, f = f = 2000N; (2) t = 5min = 300s, w = Pt = 6 × 104w × 300s = 1.8 × 107j. (3) according to P = WT, P = wt = FST = FV; (2) from P = FV, v = pf = 6 × 104w2000n = 30m / S; (1) the traction provided by the engine is 2000N; (2) the work done by the traction for 5min is 1.8 × 107j; (3) yes The driving speed is 30 m / s