Question

The centre of mass (G) of an empty pickup truck is "a" mm behind the front wheels as shown in figure 3. The wheelbase of the truck is 2800 mm. The weight of the truck Ws 30 kN (a) Determine the reaction forces that the ground imposes on the wheels at A and B (i.e. Ay and (10 marks) (b) Determine the reaction forces that the ground imposes on the wheels at A and B (i.e. Ay and (10 marks) (c) Determine the reaction forces that the ground imposes on the wheels at A and B (i.e. Ay and (10 marks) (d) Determine the reaction forces that the ground imposes on the wheels at A and B (i.e. Ay and (10 marks) By) when a 500 mm B) when a 1000 mm B) when a 1500 mm By) when a 2000 mm (e) With the results obtained in (a), (b), (c) and (d), produce response charts for the vertical (30 marks) reactions at A and B. Discuss the charts and write a brief conclusion a (mm) 500 1000 1500 2000 b (mm) 2300 1800 1300 800 Ay (kN) By (kN) b mm

Answer 1

<jiven, a. ב 800mm Moment about Bノ乏MB-O al Sco 2300 2So0 24.643 kN 2 Goo EN ら0 0 Soo 5.35 ろ ク (000 mm - ( 12 2300 RB = Box 2000-2), 429 kN

e) Responce chart for RA and Rs 40 2 Rp S 20 00 2000 2500 2600 500 Cmm) hen eve tne load ts at potnt A , Rn is max (0kN) and Re mi(okN and vice vensa alsa In orcle to balanie the veachon the total weiaht Should au at tre centve of wheel base - There is a hea γ γelahon between value a and eactions at A ond B ー-) Usualy an enoptay truck will have iķ cenhe of navitu to tne lept af tne cenhe of wheel base thitnuck İç loaded, it shift touwds When and almost beomu cenve.