This research aims to develop and produce a virtual laboratory, assisted by Adobe Flash and Pet simulation that is suitable for use as a learning resource and can help support physics practicum during the distance learning process on the fluid material for students of class XI in high school. The research method used is research and development method to ADDIE model (Analysis, Design, Development, Implementation, Evaluation). This virtual laboratory is made with the help of Adobe Flash applications and PhET simulations. Based on the results of needs analysis in several high schools in Jakarta and Bogor with total of 135 respondents, 69.6% of respondents stated that they did not do physics practicum during distance learning, 71.1% of respondents said they could better understand physics with virtual laboratory, 68.1% of respondents said they needed a virtual laboratory for fluid material, and 88.1% stated that virtual laboratory on fluid material practicum helped understand the material during distance learning. A feasibility test of virtual laboratory on fluid material practicum assisted by Adobe Flash and PhET simulation was validated by material and media experts using a validation test questionnaire. Then, trials were carried out by students and teachers of class XI in high school.