A person jogs toward a plane mirror at a speed of 3 m/s. How fast is he approaching his image in the mirror?
A) 1 5 m/s
B) 3 m/s
C) 4 m/s
D) 5 m/s
E) 6 m/s
Question 2
A 2.0-kg mass moving at 5.0 m/s suddenly collides head-on with a 3.0-kg mass at rest. If the collision is perfectly inelastic, what is the speed of the masses just after the collision?
A) 10 m/s
B) 2.5 m/s
C) 2.0 m/s
D) 0 m/s, since the collision is inelastic
