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# Maths, Mechanics a2 question watch

1. A van of mass 5200kg pulls a trailer of mass 1200kg on a straight horizontal road. The driving force of the van's engine is 4800N. Horizontal resisting forves of 600N and 200N act of the van and trailer respectively. Find:
a) Acceleration on the van and trailer.
b) The tension in the coupling between the van and trailer.

What i did for part a) made one for the van 4200-600-T=5200a
Then made of the the trailer T-200=1200a
which got me: 3400=6400a
then i got a as 0.53ms^-2
2. (Original post by harrybo6)
A van of mass 5200kg pulls a trailer of mass 1200kg on a straight horizontal road. The driving force of the van's engine is 4800N. Horizontal resisting forves of 600N and 200N act of the van and trailer respectively. Find:
a) Acceleration on the van and trailer.
b) The tension in the coupling between the van and trailer.

What i did for part a) made one for the van 4200-600-T=5200a
Then made of the the trailer T-200=1200a
which got me: 3400=6400a
then i got a as 0.53ms^-2
Consider the trailer and van as one particle.

So draw a box with mass and a forward force of and a backward force of and then resolve in the forward direction to get then solve for .
3. (Original post by harrybo6)
A van of mass 5200kg pulls a trailer of mass 1200kg on a straight horizontal road. The driving force of the van's engine is 4800N. Horizontal resisting forves of 600N and 200N act of the van and trailer respectively. Find:
a) Acceleration on the van and trailer.
b) The tension in the coupling between the van and trailer.

What i did for part a) made one for the van 4200-600-T=5200a
Then made of the the trailer T-200=1200a
which got me: 3400=6400a
then i got a as 0.53ms^-2
You'd be better off posting in the maths forum: http://www.thestudentroom.co.uk/forumdisplay.php?f=38 in the future .

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Updated: November 11, 2015
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