A spring is oscalliating vertically with a weightattached. 1. When is the veloci

Question

A spring is oscalliating vertically with a weightattached. 1. When is the velocity zero or constant? 2. When is the acceleration zero or constant? 3. What forces are acting on the weight? 4. Using newton's first law identify the point at which thenet force acting on the weight is zero. A spring is oscalliating vertically with a weightattached. 1. When is the velocity zero or constant? 2. When is the acceleration zero or constant? 3. What forces are acting on the weight? 4. Using newton's first law identify the point at which thenet force acting on the weight is zero.

Explanation / Answer

1. The velocity is 0 or constant when the weight stops moving atthe top and bottom of its vertical oscillating motion. 2. Well once the weight is dropped, the acceleration will decreaseconstantly (but not necessarily at a constant rate) until thevelocity reaches zero (or until the weight stops moving). 3. You have the force of gravity acting downwards, you have thenormal force acting upwards, and you have wind resistance acting inboth directions (also counts as the force of friction). 4. In the absence of a net external force, anobject either is at rest ormoves with constant velocity. The net force acting on the weightwill never be zero due to gravity's constant pull and the normalforce acting in the upward direction.

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