Question 1 a)
An unlucky driver has become bogged in the mud near a tree. Fortunately,
they find a rope in their car and attach it to the tree and car, and they pull on
the rope as shown in the picture. Also shown is the resulting force diagram,
demonstrating why the technique works: the car experiences a very large force
with a relatively small ‘tug’ applied by the driver. The
sum of the three forces acting on the centre point of the rope is assumed to be
zero because:

Question

Question 1 a) 
  An unlucky driver has become bogged in the mud near a tree. Fortunately,
they find a rope in their car and attach it to the tree and car, and they pull on
the rope as shown in the picture. Also shown is the resulting force diagram,
demonstrating why the technique works: the car experiences a very large force
with a relatively small ‘tug’ applied by the driver.  The
sum of the three forces acting on the centre point of the rope is assumed to be
zero because:

Answer

This point has a very small mass.

Answer

Tension forces in a rope always cancel.

Answer

This point is not accelerating.

Answer

The angle of deflection is very small.

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Question 1 a) An unlucky driver has become bogged in the mud near a tree. F...

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