00:01
So here it is given that for a beam the length l is equal to 3 .1 meter, the elasticity e equals to 220 to the power 9 newtons per meter square, i is equal to that is moment of inertia 3 .1 into 10 to the power minus 4 m to 4.
00:27
Similarly for cable the elasticity is same, radius r 10 centimeter and the length of cable is 9 meter.
00:41
So we have been given the a case and b case, for both we have to find the stiffness of the cable and beam.
00:48
So let's get started with a, that is the stiffness for beam loaded.
00:56
So this can be calculated by using the formula kp is equal to 48 times of ei by l cube.
01:07
Here is the young's modulus of elasticity that we have been given, right.
01:13
So let's plug in all the required values, so 48 times of young's modulus of elasticity for the beam is 210 to the power 9.
01:21
So here it will be 200 into 10 to the power 9, multiplied by i we have been given a 3 .5 into 10 to the power minus 4 divided by the length of the beam is given 3 .1, that whole cube...