Q1. Water flows through a pipe with circular cross section. The fluid has a radius of 5.0 cm and flows at 2.0m/s. The output has a radius of 2.50 cm. find the output velocity.
Q2. A 106.0 N grocery cart is pushed 12.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is the grocery cart's final speed in Joules?