In the figure below, the light, taut, unstretchable cord B joins block 1 and the
ID: 1278874 • Letter: I
Question
In the figure below, the light, taut, unstretchable cord B joins block 1 and the larger-mass block 2. Cord A exerts a force on block 1 to make it accelerate forward.
(a) How does the magnitude of the force exerted by cord A on block 1 compare with the magnitude of the force exerted by cord B on block 2? Is it larger, smaller, or equal? (SELECT ONE BELOW)
equal
larger
smaller
(b) How does the acceleration of block 1 compare with the acceleration (if any) of block 2? (SELECT ONE BELOW)
smaller
larger
equal
(c) Does cord B exert a force on block 1? If so, is it forward or backward? Is it larger, smaller, or equal in magnitude to the force exerted by cord B on block 2? (SELECT ONE BELOW)
Yes; forward and greater than
Yes; forward and equal
Yes; forward and less than
Yes; backward and greater than
Yes; backward and equal
Yes; backward and less than
No
Explanation / Answer
a) The magnitude of the force exerted by cord A on block 1 is larger than the magnitude of the force exerted by cord B on block 2.
b) The acceleration of block 1 is equal to the acceleration of block 2.
c) Yes. It is backward. It is equal to the force exerted by cord B on block 2.