B. Answer the following questions. a. What is force? What can a force do?
b. Define rest and motion.
c. What is work in science? Define work done aga
d. What is energy? Write any three forms of ener
e. What is heat energy?
f. What is light energy?
g.
Define kinetic energy and potential energy.
h. You are pushing wall but it does not move. Ha
thermal ene
work? Why?
i. How can energy be saved?

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?