☰ Contents · Physics

Research methods of physics and types of motion

Lessons 1–2 · 2 lessons · N. Sh. Turdiyev, K. A. Tursunmetov, A. G. Ganiyev, K. T. Suyarov, J. E. Usarov, A. K. Avliyoqulov. Physics Grade 10, 1st edition. Niso Poligraf Publishing House, Tashkent, 2017
Answers are for parents and teachers.
1
List the path from observation to law in order (5 steps).
2
A moving walkway at an airport moves at 1 m/s and is 72 m long. A passenger walks on it at 2 m/s relative to the walkway. In how many seconds does the passenger reach the end?
3
A boat covers 90 km downstream in 3 h and upstream in 5 h. What is its speed in still water (km/h)?
4
A plane flies at 40 m/s relative to the air while a crosswind of 30 m/s blows perpendicular to its course. Find its speed relative to the ground (m/s).
5
Why do physicists use air cushions or very smooth surfaces in experiments? Connect with idealization.