00:01
Hello students here is in koshan and the kaution 6.
00:04
The diameter of the piston of a hydraulic press is 30 cm, how much force is required to lift a car when 2 ,000 newton on its piston if the diameter of the piston of the pump is 3 cm.
00:19
Means this is the given, what is the given, this is the diameter, okay, what is the diameter is equal to the d, t is equal to the 30 centimeter.
00:29
Okay, radius of the piston? radius of piston.
00:37
This is equal to the r or r is equal to the d by 2.
00:40
That means 15 centimeters.
00:43
Okay.
00:44
We can return in the si unit.
00:46
This is 0 .15 centimeter.
00:49
Okay.
00:49
Then area of the piston.
00:52
Area of the piston.
00:56
Okay.
00:56
What is the area? area is equal to the 2 .5 r squared.
01:01
Oh sorry.
01:01
Pi r square okay then 2 pi r square will be equal to equal to 2 multiply by 3 .14 multiplied by the 0 .153 whole square this will comes out to be 0 .1413 meter square okay now diameter of the piston diameter of the piston is equal to d is equal to the 3 centimeter then what is the radius radius will be equal to 3 to centimeter means 1 .5 centimeter.
01:40
Then we can return is a 0 .015 meter.
01:49
Then now what is the area of the piston? then area of piston is equal to the this is the pi r.
02:00
Oh sorry, this is the pi r square.
02:03
This is only pi r square...