Solved Numerical Examples : Chapter Motion, Class 9, Science | EduRev Notes
������. ����� ���������. Kinematics Lecture 2 # Average velocity numerical. Physics Langar. �������� ���������� �� �������� �� ����� "Physics Langar"? ���. ���������� Most Expensive Pontoon Boats 2018 Youtube �� ��������. ��������� � Numerical on electric Potential part 5 - �����������������: Physics Langar 5 ����������. �������! Equipotential surfaces and Potential gradient part 3 - �����������������: Physics Langar 28 ����������. �������! Electrostatic Potential energy part 4 - �����������������: Physics Langar 20 ����������. To find average velocity from the definition of velocity, the total displacement is divided by the total time taken for that movement. V(AVG) = (v1+ v2)/ 2.� Velocity is defined as the rate of change of displacement. It can also be described as the displacement made in a unit time. Displacement is a vector: therefore, its time variation is also a vector. Velocity can be measured in two basic methods, which are known as average velocity and instantaneous velocity. Instantaneous velocity is the velocity of a particle or body in an instant or infinitesimally small amount of time. Consider a car moving in a bumpy road. YouTube does this because the more watch time a video has, the more engaging their algorithm presumes it is. In the watch time report, you can see the amount of watch time your videos have accumulated. You can also rank each of your videos by watch time and group your videos by themes, styles, and lengths to determine your most engaging types of videos. 2. Average Percentage Viewed.� And when YouTube realizes your videos can hold people�s attention, they�ll reward it with higher search and recommendation rankings. You can find this metric in your watch time report. 3. Average View Duration. Average view duration is the total watch time of your video Jon Boat Insurance Cost Youtube divided by the total number of video plays, including replays. This metric measures your video�s ability to engage viewers.

Solved Examples Ques 1: A farmer moves along the boundary of a square field of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds? Suppose the length of the track was m i What is the total distance to be covered by the athletes? She covers m in one minute by swimming from one end to the other and back along the same straight path. Find the average speed and average velocity of Nisha.

Find the acceleration of the bus. Find its acceleration. Find the average speed of the bus during each of the following intervals : a Ans: a The distance covered between The time interval is 1 hour.

The time interval is 2 hours. The time interval is 3 hours. Which of the three is the fastest and which is the slowest? So the car is the fastest and the bicycle is the slowest.

Ques 9 : An object is sliding down on the inclined plane. What is its acceleration? Ans: The situation is shown in figure. Let us take BA as the positive direction. The acceleration is positive, which means it is in the direction BA. Ques 10 : Figure shows the distance-time graph of two objects A and B which object is moving with greater speed when both are moving? Ans: The line for object B makes a longer angle with the time-axis.

Its slope is longer than the slope of the line for object A. Thus, the speed of B is greater than that of A. Ques 11 : Figure represents the speed-time graph for a particle. Ans: We draw perpendicular lines from the minute point and the minute point to the time-axis fig.

Ans: The distance covered in the time interval 0 to 20 s. Ques 13 : Figure shows the velocity-time graphs for two objects, A and B, moving along the same direction. Which object has greater acceleration? Ans: The slope of the velocity-time graph of B is greater than that for A, Thus, the acceleration of B is greater than that of A. Ques 14 : A particle moves through a distance of 3 m due east and then 4m due north.

Ans: The situation is shown in the figure. The particle starts from O. It moves through a distance of 3m due east to reach A and then through a distance of 4m due north to reach B.

Ans: Given, the total time taken is 30 min. The average speed is. At what speed should he run for the next 20 min. The speed required is. This is also the distance moved between am and am. This is also the distance moved in the interval am to am. Ques 18 : A boy is running on a straight road. He runs m towards north in 2. Calculate :- a His average speed and magnitude of average velocity during first 2. Note : This example shows that average speed is greater than the magnitude of average velocity if the direction of motion changes.

Ques 19 : It is estimated that the radio signal takes 1. Calculate the distance of the moon from the earth. Ques 20 : A wireless signal is sent to earth from a spacecraft. This signal reaches the earth in seconds. Calculate the distance of the spacecraft from the earth.

Ques 21 : A sound is heard 5 seconds later than the lightning is seen in the sky on a rainy day. Find the distance of the location of lightning. Login New User. Sign Up. Forgot Password? New User? Continue with Google Continue with Facebook. Gender Male Female. Create Account. Already Have an Account? All you need of Class 9 at this link: Class 9. Download EduRev app here for Class 9 preparation. Dr Manju Sen. It has gotten views and also has 4.

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