The 10-lb box is released from rest at position 1 and slides down the smooth inclined surf...

The 10-lb box is released from rest at position 1 and slides down the smooth inclined surface to position 2.

(a) If the datum is placed at the level of the floor as shown, what is the sum of the kinetic and potential energies of the box when it is in position 1?

---

(b) What is the sum of the kinetic and potential energies of the box when it is in position 2?

---

(c) Use conservation of energy to determine the magnitude of the box’s velocity when it is in position 2.