.com/ibiscms/modlibis/view.php?id 1564272 3/25/2015 01:00 PM A 25/100 Print calc

Question

.com/ibiscms/modlibis/view.php?id 1564272 3/25/2015 01:00 PM A 25/100 Print calculator Periodic Table uestion 2 o 4 A ladder is leaning against a vertical wall, and both ends of the ladder are at the point of slipping. The coefficient of friction between the ladder and the horizontal surface is 0.155 and the coefficient of friction between the ladder and the wall is 0.153. Determine the maximum angle with the vertical the ladder can make without falling on the ground. Number O Previous Give Up & View Solution Check Answer O Next i E

Explanation / Answer

we know tan tetha = 1 / [ 2( 1- mu1 *mu2)]

tan tetha = 1 / [ 2 *( 1 - 0.155*0.153)]

tan tetha = 1 / 1.9525

tan tetha = 0.5121

tetha = tan^-1 ( 0.5121)

tetha = 27.1degrees

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