Astring is wrapped tightly around a fixed pulley that has a moment of inertia of 0.0352 kgm2 and a radius of 12.5 cm. the string is pulled away with a constant force of 5 n. as the string unwinds the pulley begins to rotate. what is the speed of the string after it has unwound 1.25 m

This question can be solved by using the work-energy theorem.

Explanation:

The work energy theorem tells us that the total work done on an object is equal to change in the kinetic energy of that object. Since the pulley is at rest initially, initial kinetic energy is equal to zero.

Since the applied force is constant, it is easy to find the work done on the pulley. If the force wouldn’t be constant, we have to integrate the force over the distance travelled.

truck y has a greater velocity than truck x.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.