Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
Already signed up?
New to KöMaL?

Problem P. 5023. (April 2018)

P. 5023. The speed of an object sliding down a slope of angle of elevation \(\displaystyle 25^\circ\), is one-quarter of the final speed that the object could have reached if there was no friction. What is the coefficient of kinetic friction?

(4 pont)

Deadline expired on May 10, 2018.


Sorry, the solution is available only in Hungarian. Google translation

Megoldás. \(\displaystyle \mu=\frac{15}{16}\tg 25^\circ=0{,}44.\)


Statistics:

79 students sent a solution.
4 points:51 students.
3 points:11 students.
2 points:7 students.
1 point:7 students.
0 point:3 students.

Problems in Physics of KöMaL, April 2018