A 50 gram mass is hanging from a spring whose unstretched length is 10 cm and wh

Question

A 50 gram mass is hanging from a spring whose unstretched length is 10 cm and whose spring constant is 2.5 N/m.

At the time each of the following situations occurs, indicate whether the force vector requested points up (U), down (D), or has magnitude zero (0).

1. The force on the mass exerted by the spring when the mass is at its equilibrium position and has zero velocity.
2. The force on the mass exerted by the spring when the mass is at its equilibrium position and is moving downward.

3. The net force on the mass when the mass is at its equilibrium position and is moving upward. 4. The force on the mass exerted by the spring when it is at the top of its oscillation.
5. The net force on the mass when it is at the top of its oscillation.

Explanation / Answer

1. when the mass is in equilibrium position force exerted by the spring on the mass will be upward direction

2. when the mass is in equilibrium position and moving downward force exerted by the spring on the mass will be upward direction

3. when the mass is in equilibrium position and moving upward net force on the mass will be downward direction

4. when the mass is in top position force exerted by the spring on the mass will be downward direction

5. when the mass is in top position net force on the mass will be downward direction

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