Posted by **Jimmy** on Saturday, June 2, 2012 at 8:13pm.

A 0.53-kg mass is attached to a horizontal spring with k = 106 N/m. The mass slides across a frictionless surface. The spring is stretched 27 cm from equilibrium, and then the mass is released from rest.

(a) Find the mechanical energy of the system.

(b) Find the speed of the mass when it has moved 9 cm.

(c) Find the maximum speed of the mass.

- Physics -
**bobpursley**, Saturday, June 2, 2012 at 9:57pm
a) ME= 1/2 k x^2

b) 1/2 m v^2=change in PE= 1/2 k (.27^2-.09^2)

- Physics -
**Jimmy**, Sunday, June 3, 2012 at 11:05pm
In turns out that for b), instead of using

(.27^2 -0.09^2), we have to use (.27^2-0.18^2).

- Physics -
**Jimmy**, Sunday, June 3, 2012 at 11:06pm
I think your solution tells us when the spring moves 18 cm, not 9 cm.

Thank you, though. This was really useful.

## Answer This Question

## Related Questions

- Physics - A 0.495-kg mass is attached to a horizontal spring with k = 108 N/m. ...
- Physics - A 0.51-kg mass is attached to a horizontal spring with k = 108 N/m. ...
- physics - A 0.46 kg mass is attached to a spring with a spring constant of 145 N...
- Physics - A horizontal spring attached to a wall has a force constant of 780 N/m...
- physics - A new type of spring is found where the spring force F is given by F=-...
- Physics - A 0.473 kg mass is attached to a spring with a spring constant 110 N/m...
- science - A 4.50 g mass resting on a horizontal, frictionless surface is ...
- Physics - A 0.30 kg mass is attached to a spring with a spring constant 170 N/m ...
- physics - A horizontal spring attached to a wall has a force constant of 800 N/m...
- physics - A 10.7 g mass is attached to a horizontal spring with a spring ...

More Related Questions