Question

ENGR 215 - Dynamics Course Home <Homework 3 - Chapter 13 Problem 13.1 - Enhanced with Hints and Feedback The 9 lb particle is subjected to the action of its weight and forces Fi = {21 + 6j - 2tk) lb, F, = {tº - 4 - 1k} lb, and F,-{-2ti} lb, where t is in seconds. (Figure 1) Part A Determine the distance the ball is from the origin 3 s after being released from rest. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) MAO ? Figure < 1 of 1 180 You have already submitted this answer. Enter a new answer No credit lost. Try again. Submit Previous Ansons Provide Feedback

Answer 1

Fiz Qi+ 6j-2t k F2= t2i-ut jit l =96 F = -ati EF= ma (2it6j-2tk)+(t'i-utj-iky -2tio-9k - = ( 2 ) (axitaji tazk) 12.2 32:2 3212 x equating componente ax: +-24+2 ; Lay= -4t+b; 3.92= -26-10 since are adt, integrating reo, tao Yields --4t+27 ; a Vy - -zt’ust ; qv=-t?-100 since ds=vat, integrating sio, to Yields (72) Su = $" *; 953 = -2*32?; met mest When t= 3 sec Sx=24.15, Sy- 32.2, Sz <-8558667. 32.2 32:2 32.2 és Szs Csaje + (Sy Je +(63) af s= √ (24:18) ²+ (3202)²+ (-85-8667)? og þar 8993:147 - Dout It als= 94.83 ft