Physics of walking is explained by taking a question involving walking on ice considering one particular state of walking. Step size is particularly important in case of walking on ice as the coefficient of friction is quite small in this case. The embedded version of this video can be seen below. The direct URL of large player can be accessed from here.
If the sum of the coefficients in the expansion of $(x+y)^n$ is 4096, then the greatest coefficient in the expansion is _ _ _ _ . Solution $C_0 + C_1 + C_2 + C_3 + ......................... + C_n =4096 $ $\therefore 2^n = 4096 =2^{12} $ $\Rightarrow n = 12 $ Greatest coefficient = ${}^{12}{C_6} = 924$