# Fisika Study Center

## Physics Olympiads Series Problem 17

Fisikastudycenter.com, Physics Olympiads Problem Series in mechanics, newton's law, acceleration and contact force for beginner level.

Problem 17
Three blocks (mA = 3 kg, mB = 5 kg and mC = 2 kg that are touching each other in a frictionless ramp with θ = 37°, shown in the figure below.

A force F of 75 N is applied on mA. Find the system acceleration, use sin 37 ° = 3/5 and the acceleration due to gravity g = 10 m/s2
Problem Source : Fisikastudycenter.com-Modifikasi Soal Tes Seleksi Olimpiade Fisika Tingkat Kabupaten /Kota Tahun 2011

Discussion
Draw all acting forces on the three block, combine the three as a system.

Apply newton's law to find the system acceleration.

prepared by:
Fisika Study Center

Try This Problem!
Three blocks (m1, m2 dan m3) that are touching each other on a frictionless ramp with θ, see the figure.

A force F is applied at m1. Find the system acceleration, show the answer in F, m1, m2, m3, θ and g !
Problem source : Fisikastudycenter.com-Modification of Indonesian Physics Olympiads - District / City Level Year 2011

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