A 02 Kg Rubber Ball Is Dropped from the Window of of a Building

Multiple Choice

A 0.2 kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30 m/s and rebounds up at 20 m/s. The magnitude of the impulse due to the collision with the sidewalk is:

A) 10 N .s
B) 6.0 N .s
C) 2.0 N .s
D) 19.6 N . s
E) 9.8 N .s