A mass of 0.50 kg is attached to a massless spring with a spring constant k = 600 N/m see figure above). The system rests on a level, friction-free surface and is initially at rest. A second mass of 0.20 kg makes an elastic head-on collision with the mass attached to the spring; thereafter, the oscillating system vibrates with an amplitude of 0.25 m. What was the incident speed of the second mass?
A) 15 m/s
B) 8.7 m/s
C) 6.1 m/s
D) 11 m/s
E) 5.3 m/s

Question

A mass of 0.50 kg is attached to a massless spring with a spring constant k = 600 N/m see figure above). The system rests on a level, friction-free surface and is initially at rest. A second mass of 0.20 kg makes an elastic head-on collision with the mass attached to the spring; thereafter, the oscillating system vibrates with an amplitude of 0.25 m. What was the incident speed of the second mass?
A) 15 m/s 
B) 8.7 m/s 
C) 6.1 m/s 
D) 11 m/s 
E) 5.3 m/s

Quizplus · Accepted Answer

The Answer of  A mass of 0.50 kg is attached to a massless spring with a spring constant k = 600 N/m see figure above). The system rests on a level, friction-free surface and is initially at rest. A second mass of 0.20 kg makes an elastic head-on collision with the mass attached to the spring; thereafter, the oscillating system vibrates with an amplitude of 0.25 m. What was the incident speed of the second mass?
A) 15 m/s 
B) 8.7 m/s 
C) 6.1 m/s 
D) 11 m/s 
E) 5.3 m/s

A Mass of 0