3(H) | Relative Velocity, Example 3.9, Exercise 3.1, 3.2, 3.3 | Motion i...

Example 3.9 Two parallel rail tracks run north-south. Train A moves north with a speed of 54 km h–1 with a speed of 90 km h–1 , and train B moves south . What is the (a) velocity of B with respect to A ?, (b) velocity of ground with respect to B ?, and (c) velocity of a monkey running on the roof of the train A against its motion (with a velocity of 18 km h–1 with respect to the train A) as observed by a man standing on the ground ?

Exercise 3.1
In which of the following examples of motion, can the body be considered approximately a point object: (a) a railway carriage moving without jerks between two stations. (b) a monkey sitting on top of a man cycling smoothly on a circular track. (c) a spinning cricket ball that turns sharply on hitting the ground. (d) a tumbling beaker that has slipped off the edge of a table.

Exercise 3.2
The position-time (x-t) graphs for two children A and B returning from their school O to their homes P and Q respectively are shown in Fig. 3.19. Choose the correct entries in the brackets below ; (a) (A/B) lives closer to the school than (B/A) (b) (A/B) starts from the school earlier than (B/A) (c) (A/B) walks faster than (B/A) (d) A and B reach home at the (same/different) time (e) (A/B) overtakes (B/A) on the road (once/twice).

Exercise 3.3
A woman starts from her home at 9.00 am, walks with a speed of 5 km h–1 on a straight road up to her office 2.5 km away, stays at the office up to 5.00 pm, and returns home by an auto with a speed of 25 km h–1. Choose suitable scales and plot the x-t graph of her motion.

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5(D) | Exercise 5.4 & Exercise 5.5 (1, 2, 3) | Continuity & Differentiab...

In this lecture, I am discussing derivative of logarithmic and exponential functions following by NCERT Exercise 5.4 and 5.5.

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��Online Lecture - 9(A) | APPLICATIONS OF TRIGONOMETRY | Class 10 | Maths

In this lecture, I am discussing basics of Applications of Trigonometry and following questions from NCERT Exercise 9.1



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��Online Lecture - 4(A) | Class 11 | Mathematics | Chapter 4 | PRINCIPLE ...

In this lecture, I am discussing about Principle Of Mathematical Induction, based on Chapter 4 of NCERT Mathematics Textbook, following by solutions of following questions from Exercise 4.1 :
Question 1
Question 2
Question 3
Question 4
Question 5

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�� NCERT Example 3.1 | PHYSICS Questions | Chapter 3 | CLASS 11

A car is moving along a straight line, say OP in Fig. 3.1. It moves from O to P in 18 s and returns from P to Q in 6.0 s. What are the average velocity and average speed of the car in going (a) from O to P ? and (b) from O to P and back to Q ?
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��Online Lecture 3(B) | PHYSICS | Class 11 | KINEMATICS

In this lecture, I am discussing various numericals based on distance, displacement, vector, average speed and average velocity.
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��Online Lecture - 2(B) | Class 12 | Mathematics | Chapter 2 | INVERSE TR...

In this lecture, I am discussing derivations of various inverse trigonometry identities and NCERT Exercise 2.2 solutions. #FreeClasses #MathsAndPhysics #AshishKumarLetsLearn #CompleteSyllabus