Posted by **mary ann ** on Monday, December 14, 2009 at 5:33pm.

A 1.5 kg box moves back and forth on a horizontal frictionless surface between two springs.?

The box is initially compressed against the stronger spring, K=32 N/cm, 4.0 cm and released from rest. The smaller box is K=16 N/cm.

A) By how much will the box compress the weaker spring?

B) What is the maximum speed the box will reach?

- physics -
**drwls**, Monday, December 14, 2009 at 7:24pm
I think that you meant to write "The weaker spring

The 4.0 cm compression of the strong spring will result in a 128 N push by the strong (compressed) spring and a 64 N pull by the other (stretched) spring. It will start compressing the weaker spring when released. The potential energy stored in springs when release occurs will be (1/2)[32 + 16]*4^2= 384 J

(A) The weaker spring starts out stretched. When it gets maximum compression later, the kinetic energy will be zero and 384 J will again be stored in spring potential energy. The compression of the weaker spring will be 4 cm.

(B) Solve (1/2)(M1 + M2)V^2 = 384 J to get V.

## Answer this Question

## Related Questions

- physics - a 1.5 kg box moves back and forth on a horizontal frictionless ...
- physics - A 1.82 kg box moves back and forth on a horizontal frictionless ...
- Physics - *I am lost on a bunch of different problems, and this is one of them. ...
- Physics - A 4.5kg box slides down a 4.1-m -high frictionless hill, starting ...
- physics - A 5 kg box is pushed against a K= 40 n/m spring on a horizontal ...
- physics - a box whose mass is 0.3 kg is pushed against a spring(k=40n/m) on a ...
- physics - A horizontal spring with spring constant 73.2 N/m is compressed 16.7 ...
- Physics - A horizontal spring with spring constant 110N/m is compressed 16cm ...
- Physics - A horizontal spring with spring constant 110N/m is compressed 16cm ...
- Physics - A 1.6kg box that is sliding on a frictionless surface with a speed of ...

More Related Questions