Homework Help: PHYSICS

Posted by Ryan on Sunday, October 25, 2009 at 2:22pm.

[HELP WITH PART D PLEASE SCROLL DOWN] A 920 kg car is pulling a 300 kg trailer. Together, the car and trailer have an acceleration of 2.20 m/s2 in the forward direction. Neglecting frictional forces on the trailer, determine the following (including sign). the net force on the car
2024
(b) the net force on the trailer
660
(c) the force exerted by the trailer on the car
-660

(d) the resultant force exerted by the car on the road magnitude ____________ N
direction ________° measured from the left of vertically downwards

thanks!!!!!!!

PHYSICS - bobpursley, Sunday, October 25, 2009 at 2:25pm
a, you have to have on the car a pulling force equal to a*masscar+a*masstrailer
b. correct.
d. on the road, that is the same as the force (Horizontal) + weightcar (down)
PHYSICS - Ryan, Sunday, October 25, 2009 at 2:36pm
so i should add the 2040 with what? whats the horozontal force?
PHYSICS - Ryan, Sunday, October 25, 2009 at 2:39pm
wait what is the weight of the car 1010 kg?
PHYSICS - bobpursley, Sunday, October 25, 2009 at 3:52pm
The force pulling the car is exactly this
(masscar+masstrailer)acceleartion

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