The power of automobile engine is 6 times 10 to the fourth power W, and the resistance is 1800n. Under the rated power, find the driving speed

The power of automobile engine is 6 times 10 to the fourth power W, and the resistance is 1800n. Under the rated power, find the driving speed

In fact, the above children's shoes answer is right, but first of all, you need to understand that in the process of movement, the car engine overcomes the friction to do work, that is, the amount of traction is equal to the amount of friction, that is, f = PV = f friction
So FMO = P / v = 33.3m/s
Notice that this is just the speed after uniform motion,

The rated power of a certain type of automobile engine is 60000w, and the resistance is 1800n when driving at a constant speed on the horizontal road
Under the rated power, when the car runs at a constant speed, (1) the amount of traction provided by the engine, (2) the amount of driving speed, (2) the work done by the traction for 5 minutes

When the car runs at a constant speed
F=f=1800N
Driving speed v
P=FV V=P/F=33.3m/s
Work done by traction for 5 minutes
W=Pt=18000000j

21. The rated power of a certain type of automobile engine is 6 × 104w, and the resistance is 1800n when driving at a constant speed on a horizontal road
(l) The amount of traction provided by the engine;
(2) Driving speed;
(3) Work done by traction after driving for 5 minutes

(1) 1800N
(2) 6*104W/1800N
(3) 6*204W*5min