Department of Natural Sciences
Clayton State University
Morrow, Georgia

January 22, 2009

SCI 1901E - Quiz 2

Name _________SOLUTION____________

(04)    1.    The two types of mechanical energy are

                    a.    Kinetic energy

                    b.    Potential energy

(06)    2.    a.    A net force of 28.0 N is exerted on a mass of 7.00 kg.  Calculate the acceleration of the object.

a = F_net / m

a= (28.0 N) / (7.00 kg)

a = 4.00 N/kg = 4.00 m/s²_ANS

                    b.    As a result of this force the object moves 15.0 m in the direction of the force. Calculate the amount of work done by the
                            force during this displacement.

W = F d

W = (28.0 N) (15.0 m)

W = 420 J_ANS

                        c.    Calculate how power associated with this work if the 15.0 m displacement occurs in 0.600 s.

P = W / Dt

P = (420 J) / (0.600 s)

P = 700 W _ANS

(05)    3.    Give the full name and abbreviation of the special unit in the SI system for each of the following quantities:

                       a.    Force:

newton, N

                b.    Work:

joule, J

                c.    Kinetic energy:

joule, J

                d.    Potential energy:

joule, J

                e.    Power:

watt, W