A 12-Kg Projectile Is Launched with an Initial Vertical Speed

Multiple Choice

A 12-kg projectile is launched with an initial vertical speed of 20 m/s.It rises to a maximum height of 18 m above the launch point.What is the change in mechanical energy caused by the dissipative (air) resistive force on the projectile during this ascent?

A) -0.64 kJ
B) -0.40 kJ
C) -0.52 kJ
D) -0.28 kJ
E) -0.76 kJ