A penny of mass 0.17 kg is placed at the outside edge of a 12'' diameter (or Long Play vinyl) record as shown in the image below. The penny does not slide off but rotates with the record at a constant speed of 0.83 m/s. What is the magnitude of the frictional force acting on the penny, assuming that the coefficient of friction is μ = 0.995? Remember that 1'' = 2.54 cm and give your answer to two decimals.

Isuck at math i am no sorry

Iwould say a is accurate

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !

It is increased due to the doppler effect. (apex)