Why does the speed of the electric mixer affect the tape stuck to the beater?

[viviseraph00]

when you're done using an electric mixer, you can get most of the batter off the beaters by lifting them out of the batter with the motor running at a high enough speed. Let's imagine, to make things easier to visualize, that we instead have a piece of tape stuck to one of the beaters.
1) explian why static friction has no effect on whether or not the tape files off

2) suppose you find that the tape doesn't fly off when the motor is on a low speed, but speeding it up does cause it to fly off, why would the greater speed change things

 

[tiny-tim]

Welcome to PF!

Hi viviseraph00! Welcome to PF!

We can't answer the questions for you, but here's a hint to get you started …

what are the names and directions of all the forces involved?

 

[astrokreng]

1) Static friction is a force that acts between two surfaces in contact with each other and resists their relative motion. In this case, the tape is stuck to the beater due to static friction between the two surfaces. However, the speed of the electric mixer does not have any effect on the static friction between the tape and the beater. This is because static friction only depends on the nature of the surfaces in contact and the force pressing them together, not on the speed at which they are moving.

2) When the motor is on a low speed, the beater is rotating at a slower rate and therefore the force of static friction between the tape and the beater is also lower. This allows the tape to remain stuck to the beater despite the force of gravity pulling it down. However, when the motor is sped up, the beater rotates at a higher rate and the force of static friction between the tape and the beater increases. This can reach a point where the force of static friction is no longer able to hold the tape in place, and it flies off due to the force of gravity. So, the greater speed of the motor increases the force of static friction and causes the tape to fly off.