The drum of a laundry machine, which can be modeled as a cylinder with a radius of 32 cm, is spinning about its vertical axis with an unknown angular speed ω. A wallet in contact with the inside wall of the spinning drum moves with the drum without slipping. The coecient of static friction between the wallet and the surface of the drum is µs=0.45. The mass of the wallet is 210 grams. What is the minimum value the angular speed can have (ωmin) so that the wallet does not slip ?

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