# Fisika Study Center

## Physics Olympiads Series Problem 10

Fisikastudycenter.com,- Physics Olympiads problems series, for beginner, problem 10. Fundamental concepts needed in this problems are Newton law, forces, torque, inertia, and angular acceleration.

Problem 10
Given a figure below. A mass of m1 = 10 kg and a cylinder of m2 = 5 kg. See figure below. Ignore the mass and frictional force of the pulley. The inner radius of cylinder is r = 0.25 m and the outer is R = 0.5 cm. Assume the string and cylinder as a yo-yo, ignore the floor frictional force. The slop has θ, the m1 moves down.The cylinder inertia is ½ mR2. Find the acceleration of m1 and m2, use the acceleration due to gravity g = 10 m/s2 and sin 37° = 0,6
Problem source:
(Fisika Study Center-Modifikasi Soal Fisika Seleksi OSN 2008 Tingkat Provinsi )

## Physics Olympiads Series Problem 9

Fisikastudycenter.com,- Physics Olympiads problems series, for beginner, problem 9. Fundamental concepts needed in this problems are Newton law, forces, torque, inertia, and angular acceleration.

Problem 9
Given a figure below. A mass of M = 10 kg and a cylinder of m = 5 kg (M = η m)shown below. Ignore the mass and frictional force of the pulley. The inner radius of cylinder is r = 0.25 m and the outer is R = 0.5 cm. Assume the string and cylinder as a yo-yo, the floor has frictional force. The slop has θ, the M moves down.The cylinder inertia is ½ mR2 and it rools without slipping. Find the acceleration of M, use the acceleration due to gravity g = 10 m/s2 dan tan 37° = 0,75
Problem source:
(Fisika Study Center-Modifikasi Soal Fisika Seleksi OSN 2008 Tingkat Provinsi )

## Physics Olympiads Series Problem 8

Physics.fisikastudycenter.com,- Physics Olympiads Problems and Solutions Examples, Problem 8 for senior high school. Basic concepts needed in this problem are mechanics, forces, torque, equilibrium and phytagorean.

Problem 8
In figure below, what magnitude of force F should be applied on the wheel is necessary to raise the wheel over an obstacle of height h, the radius of the wheel is R , it's mass is m and the accelaration due to gravity is g, show the answer in g, R and h. ## Physics Olympiads Series Problem 7

Physics.fisikastudycenter.com,- Physics Olympiads Problems and Solutions Examples, senior high school, mechanics, forces, centripetal force, circular motion, equilibrium. Problem #7
A string 30 cm long is used to whirl a particle of mass m in horizontal circle at velocity of v shown above figure. Find the magnitude of the particle velocity, sin 37° = 3/5, sin 53° = 4/5 and use the acceleration due to gravity g = 10 m/s2

## Physics Olympiads Series Problem 5

Fisikastudycenter.com-Physics Olympiads Problems and Solutions Examples.

Problem #5

A bullet of 10 g of mass and 1000 m/sec of velocity travels upward colliding a block 0f 5 kg of mass at rest. The bullet passes through center of mass of the block. Assume that very short time is needed during the collision. a) Find the velocity of the block after collision, if the velocity of the bullet as it leaves the block is 400 m/sec !

b) Find the maximum heigth of the block! c) Find the loss of origin kinetic energy in this collision! Use the acceleration due to gravity g = 10 m/s2. (Source: OSN 2008 District Selection /Indonesian Physics Olympiad)

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