A 500-kg sack of coal is dropped on a 2000-kg railroad flatcar which was initially moving at 3 m/s as shown. After the sack rests on the flatcar, the speed of the flatcar is:
A) 0.6 m/s
B) 1.2 m/s
C) 1.8 m/s
D) 2.4 m/s
E) 3.6 m/s

Question

A 500-kg sack of coal is dropped on a 2000-kg railroad flatcar which was initially moving at 3 m/s as shown. After the sack rests on the flatcar, the speed of the flatcar is: 
A) 0.6 m/s 
B) 1.2 m/s 
C) 1.8 m/s 
D) 2.4 m/s 
E) 3.6 m/s

Quizplus · Accepted Answer

The Answer of A 500-kg sack of coal is dropped on a 2000-kg railroad flatcar which was initially moving at 3 m/s as shown. After the sack rests on the flatcar, the speed of the flatcar is: 
A) 0.6 m/s 
B) 1.2 m/s 
C) 1.8 m/s 
D) 2.4 m/s 
E) 3.6 m/s

A 500-Kg Sack of Coal Is Dropped on a 2000-Kg