This study aims to examine the effect of experimental method on student learning motivation and student learning outcomes on rectilinear motion material in grade X at MAN Kendal. This is a quantitative research with a sample of 34 students of class X MIPA 4 as an experimental group and 32 students of class X MIPA 2 as a control group. Data collection techniques using test, questionare, observation, interview, and documentation. The experimental class is given learning using experimental methods and control classes using conventional methods. The hypothesis was tested using t test and simple linear regression. The results of hypothesis test show that learning motivation of the experimental class students is higher than the control class and learning outcomes of the experimental class are better than the control class. Based on the results of data analysis, it was concluded that there was a correlation between the experimental method of student motivation and learning outcomes.

Learning-based industrial revolution 4.0 is focused on improving digital skills, one of which is by using of Arduino-based microcontrollers. This study aims to develop a digital kinetic friction coefficient by using Arduino Nano ATmega 328P with LDR sensors. Type of the research is research and development (RnD), the stages are includes defining, designing, developing and disseminating. Based on the results of the test tool, it was found that the kinetic friction coefficient for mass and angle variations for the fabric, towel, and carpet fields showed consistently. The kinetic friction coefficient between the object and the surface of the fabric type is 0.6053; the towel field type is 0.5733; the carpet type is 0.4199. Thus, practicum tools that have been developed can be used to determine the kinetic friction coefficient between the object and the surface.