## Centripetal force

(1) What centripetal force does a 600kg mass car achieve when traveling a 100m radius curve at a speed of 15m / s²?

(2) What should be the coefficient of static friction between the road and the tires so that the previous exercise car does not slip?

## Systems

(1) What is the following system acceleration, with the plane's dynamic friction coefficient equal to 0.2?

*Considering each block individually:*

* *

*For 1st block:*

*For the 2nd block:*

*Vertically: *

*On the horizontal:*

*We can assemble a system of equations and add it:*

## Job

(1) What is the work performed by a force of intensity 100N, forming an angle of 30 ° with the horizontal, when the body moves 1km horizontally?

(2) What is the work done by the following 0.5kg sphere:

(a) vertically:

(b) horizontally: