posted by Liz .
30. A truck of mass 2250 kg is used to pull a 330 kg trunk out of an old quarry as shown below. There is 550 N of rolling resistance for the truck. Ignore mass and friction of the pulley. (a) If the trunk is accelerated upward at 2.00 m/s2 what is the minimum amount of horizontal force the truck’s drive wheels exert on the ground? (b) For the same conditions what is the tension in the towrope?
m1=2250 kg, m2 =330 kg, R=550 N, a= 2 m/s²
m2•a =T- m2•g
F= a(m1+m2) +m2•g+R=...