A 160-Kg Space Probe Is Moving in the Positive X

Multiple Choice

A 160-kg space probe is moving in the positive x direction at 18 km/s when it encounters a time-dependent force directed in the negative x direction. The force is as follows:

Determine the final speed of the space probe.

A) 8.6 km/s
B) 5.3 km/s
C) 11 km/s
D) 16 km/s
E) 23 km/s