Posted by **Liz** on Friday, October 19, 2012 at 1:20pm.

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?

- Physics -
**Elena**, Friday, October 19, 2012 at 2:13pm
m1=2250 kg, m2 =330 kg, R=550 N, a= 2 m/s²

m1•a=F-R-T

m2•a =T- m2•g

a(m1+m2)=F-R-T+T-m2•g

F= a(m1+m2) +m2•g+R=...

T=m2(a+g)=…

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