Class 9 Physics Ch 2
Important easy to understand Notes of Class 9 Physics Ch 2 English Medium written by Professor Sulman Arif Suib. These notes are very helpful in the preparation of Physics for students of the 9th class Physics English Medium and these are according to the paper patterns of all Sindh Book Boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- What is kinematics?
- Define Rest and Motion.
- Define types of Motion: (1) Translatory Motion (2) Rotatory Motion (3) Vibratory Motion with an example.
- What is the linear, circular, and random motion?
- Differentiate between Distance and Displacement.
- Differentiate between Speed and Velocity.
- Define Uniform Speed and Uniform Velocity.
- What is acceleration? Also write its formula and unit.
- What is Uniform Acceleration?
- Differentiate between Scalar and Vector.
- Derive first equation of motion. Vf = Vi + at
- Derive second equation of motion. S = Vit + 1/2 at2
- Derive third equation of motion. 2aS = Vf2 - Vi2
- Solved Numerical of the exercise Class 9 Physics Ch 2.
- A car travels 700m in 35 seconds. What is the speed of car?
- A bus travels 1210m in 55 seconds. What is the speed of car?
- Calculate the acceleration of a bus that speed up from 40ms-1 to 50ms-1 in 5 seconds.
- The speed of train is 108kmh-1. How much distance will be covered in 2 hours.
- The speed of train is 36kmh-1. How much distance will be covered in 3 hours.
- A bus is moving on a rod with 15ms-1 and is it accelerates at 5ms-1. Find the final velocity of bus after 6 seconds.
- A bus is moving on a rod with 25ms-1 and is it accelerates at 8ms-1. Find the final velocity of bus after 3 seconds.
- A bus starts from rest and travels along a straight path its velocity become 15 ms-1 in 5 seconds. Calculate acceleration of the bus.
- A bus starts from rest and travels along a straight path its velocity become 18 ms-1 in 3 seconds. Calculate acceleration of the bus.
- A motorcycle list moving along a straight path applies brakes to slow down from 10ms-1 to 3ms-1 in 5 seconds. Calculate its acceleration.
- A motorcycle list moving along a straight path applies brakes to slow down from 14ms-1 to 7ms-1 in 4 seconds. Calculate its acceleration.
- A car starts moving from rest with an acceleration of 5ms-1. Find out the time to travel 50m distance.
- A car starts moving from rest with an acceleration of 6ms-1. Find out the time to travel 72m distance.
- A car moving on a rod with velocity 30ms-1, when brakes are applied its velocity decreases at a rate of 6m per second square. Find the distance it will cover before coming to rest.
- A car moving on a rod with velocity 20ms-1, when brakes are applied its velocity decreases at a rate of 5m per second square. Find the distance it will cover before coming to rest.
- A motorcycle moving with velocity of 50ms-1. It gets accelerating at a rate of 4 ms-1. How much distance will it cover in the next 12 seconds.
- A ball is dropped from a height of 50m. What will be its velocity before touching ground.
- A ball is dropped from a height of 70m. What will be its velocity before touching ground.
- A ball is thrown vertically upward with velocity of 12ms-1. The ball will be slowing down due to full of earth is gravity on it, and will return back to Earth. Find out the time the ball will take to reach the maximum height.
- A ball is thrown vertically upward with velocity of 16ms-1. The ball will be slowing down due to full of earth is gravity on it, and will return back to Earth. Find out the time the ball will take to reach the maximum height.
- If a body is thrown upward with vertical velocity 50ms-1. Calculate maximum height which body can reach.
- If a body is thrown upward with vertical velocity 30ms-1. Calculate maximum height which body can reach.
- A ball falls down from top of height of 70m. How much time the ball will take to reach the ground?
- A ball falls down from top of height of 40m. How much time the ball will take to reach the ground?