537_Dynamics 11ed Manual

# 537_Dynamics 11ed Manual - = N B 1 lb = a 1 ft s 2 = Given...

This preview shows page 1. Sign up to view the full content.

Engineering Mechanics - Dynamics Chapter 17 Problem 17-45 The van has weight W v and center of gravity at G v . It carries fixed load W l which has center of gravity at G l . If the van is traveling at speed v , determine the distance it skids before stopping. The brakes cause all the wheels to lock or skid. The coefficient of kinetic friction between the wheels and the pavement is μ k. . Compare this distance with that of the van being empty. Neglect the mass of the wheels. Given: W v 4500 lb = b 2f t = W l 800 lb = c 3f t = v 40 ft s = d t = μ k 0.3 = e 6f t = f 2f t = g 32.2 ft s 2 = Solution:
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: = N B 1 lb = a 1 ft s 2 = Given N A N B + W v − W l − = k N A N B + ( ) W v W l + g ⎛ ⎝ ⎞ ⎠ a = N B − f b + c + ( ) W l b c + ( ) + W v c + W l g ⎛ ⎝ ⎞ ⎠ ae W v g ⎛ ⎝ ⎞ ⎠ ad + = N A N B a ⎛ ⎜ ⎜ ⎝ ⎞ ⎟ ⎟ ⎠ Find N A N B , a , ( ) = N A N B ⎛ ⎜ ⎝ ⎞ ⎟ ⎠ 3777 1523 ⎛ ⎝ ⎞ ⎠ lb = a 9.66 ft s 2 = d l v 2 2 a = d l 82.816 ft = Unloaded W l 0 lb = Guesses N A 1 lb = N B 1 lb = a 1 ft s 2 = Given N A N B + W v − W l − = 535...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online