00:01
Now in this problem we are given that a formula 1 car has a mass of 752 kg and the efficiency of the engine is 43%.
00:12
And we need to find that how much power is required to speed up the car from rest, means its initial velocity is 0, to a speed of 25 m per second.
00:24
So final becomes 25 m per second.
00:28
And time taken is 6 .45 seconds.
00:32
So this is the given data.
00:34
Now to find the actual power, first we will find the work done, required.
00:39
So work done would be equals to the change in kinetic energy, the work energy theorem.
00:43
From this we can write that work done would be equals to the change in kinetic energy.
00:48
So 1 over 2 m times vf square minus vi square.
00:55
Correct? now just put the values.
00:56
So 1 over m, 1 over 2 sorry, m is 752 kg times the final speed is 25 and its square minus 0 square.
01:09
So if you simplify this, you will get this value to be 235000 joules.
01:16
So this is the work done required...