Q1. A 5.20 g pop up toy is compressed 1.50 cm and pops up to the height of 50 cm the spring constant is 270 Nm. What is the loss of energy?

Q2. A box of Cheerios (mass mC = 0.9 kg) and a box of Wheaties (mass mW = 2.7 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.0 N, and the magnitude of the frictional force on the Wheaties box is 3.8 N. If the magnitude of is 12 N, what is the magnitude of the force on the Wheaties box from the Cheerios box?