Answer Happy

A cube, whose mass is 0.580 kg, is attached to a
spring with a force constant of 110 N/m. The cube rests
upon a frictionless, horizontal surface (shown in the figure
below).
The cube is pulled to the right a
distance A = 0.120 m from its
equilibrium position (the vertical dashed line) and held
motionless. The cube is then released from rest.
(a) At the instant of release, what is the magnitude of the
spring force (in N) acting upon the cube?
(b) At that very instant, what is the magnitude of the cube's
acceleration (in m/s2)?
(c) In what direction does the acceleration vector point at the
instant of release? (pick one)
- Toward the equilibrium position (i.e., to the left in the
figure).
- The direction is not defined (i.e., the acceleration is
zero).
- Away from the equilibrium position (i.e., to the right in the
figure).
- You cannot tell without more information.
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