HEsca

An object of mass m is being pulled upward by

a string, at constant acceleration a. Another

string of negligible mass runs from the upper

mass to an equal lower mass, which is being

pulled upward simultaneously.

What can you say about the tension in the

string connecting the two masses, given no

other information?

1. The tension is greater than m g.

2. The tension is less than 2m g.

3. The tension is zero, since it is the upper

string that is accelerating the system.

4. None of these

5. The tension is less than m g.

6. The tension has the same magnitude as

the force applied to the upper.