Một con lắc lò xo thẳng đứng tại nơi có gia tốc g=10m/s lò xo có k=50N/m khi vật dao động thì lực kéo cưcj đại của lò xò lên giá treo lần lượt là 4N và 2N. Vận tốc cực đại của dao động là?

Wind or electric energy force force of friction

Which principle states: "geologic processes taking place on earth today operated similarly in the past and can be used to explain past geologic events"? a. lateral continuity

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Ibelieve the answer is either b or c, but i'm leaning more towards c.hope my answer has you : )