00:01
This question we are given here coefficient of kinetic friction so we can write here coefficient of kinetic friction so it is denoted by new k which is equal to 0 .3 also we are given here mass so mass m which is denoted by denoted by m so m which is equal to 100 kilogram and we are also given here is velocity so velocity which is denoted by v which is equal to 6 meter per second 100 kilograms so we are 100 kilograms of carrot and that move with the velocity 6 meter per second and we have kinetic coefficient of kinetic friction nu k which is equal to 0 .3 now we want to find a distance so here in this question we want to find distance distance is size side in order to attain speed speed 5 meter per second.
01:06
So we can write here, write here distance.
01:10
We want to find that distance at s.
01:13
So distance which is denoted by s.
01:16
We are given here velocity.
01:17
So velocity is 5 meter per second.
01:21
We are using equation of motion.
01:24
So by using equation of motion.
01:28
So we can write here equation of motion.
01:32
So we can write here summation f f y, which is equal to m multiple by a y which is equal to 0 now we can write here f plus 1 ,000 multiplied by 3 divided by 5 minus 800 multiplied by sine 30 degree minus m g which is equal to 0 now we can write here f plus 100 here we can write here 1000 multiplied by 3 divided by 5 minus 800 multiple of a sine 30 degree minus what is the m here is 100 kilogram and what is the g here j is the 9 .81 which is equal to g to we just substituting the value of m and g and this equation and we get this equation now we just simply by this equation and finding the value of f so where what is the f here so f which is equal to 781 newton so this is the value of force we are using the principle of work and energy.
02:47
So we are using the principle of work and energy...