Ncert solutions for class 11 physics chapter 3
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Solution No, because the x-t graph does not represent the trajectory of the path followed by a particle. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 m s —1 to hit the plane? You will learn about this motion in more detail in Chapter14. Does that make any rotation a vector? He has created a youtube channel in the name of Physics Galaxy. Two equal vectors located at different locations in space need not produce the same physical effect. Choosing the positive direction as the constant direction of motion, give the signs of v and a in the three intervals. In which interval is the average speed greatest, and in which is it the least? For example, despite having magnitude and direction, current is a scalar quantity.

It gains velocity initially, then it stops momentarily when it hits the wall and from the wall it rebounds and starts moving in the opposite direction with a constant speed. The fire was one of the first discovery made by man. Such a case happens when a particle is projected upwards. Three equal intervals of time are shown. Finding the market closed, he instantly turns and walks back home with a speed of 7.

The situation is shown in the given figure. This is because speed being a scalar quantity cannot be negative. On the figure three equal intervals of time have been marked. What minimum acceleration of car B is required to avoid an accident? Find notes, question papers for various other subjects like Mathematics, Biology, Chemistry, and many competitive exams as well. Plot the x— t graph of his motion. No such distinction is necessary when we consider instantaneous speed and magnitude of velocity.

It is apparent from the graph that height is the greatest in interval 3. Hence obtain expression for electric field intensity in a parallel plate capacitor. The modern world today is completely altered, mainly due to the major advancements in technology. Till now more than 3. Derivation of the Kinematic Equation for Uniformly Accelerated Motion hold a major significance and are explained in a limpid manner to help the student to not only understand their derivation but also apply them wherever required. Students often get stuck and are unable to utilize a hundred percent of their time studying.

For more information visit below links Youtube Channel Link: Facebook Page:- Twitter:- Instagram:- We are team of engineers and researchers and wanted to share our experience and knowledge free to everyone. Leela is 4 years younger than Radha. However, it has acceleration equal to the acceleration due to gravity g that acts in the downward direction at that point. It happens only in the case of uniform circular motion. Let be the angle made by the vector , with the x-axis, as shown in the following figure.

Current is described only by its magnitude. It has six faces and all of them are identical squares. However, here the particle acquires some uniform speed. In the given case, the cyclist comes to the starting point after cycling for 10 minutes. Three different equal intervals of time are shown. Therefore, the cap and the carriage can be considered as point objects. Hence, acceleration is negative in this interval.

Acceleration of the particle using i will be positive. . Since the dot product of two quantities is always a scalar, work is a scalar physical quantity. Solution a If a vertical line is drawn from any point on axis representing t, we see that it cuts the graph at two points which means particle has two positions at the same instant of time which is not possible. The position-time x-t graph represents two men Z and Y going to their homes J and K , respectively, from their offices. The atom bomb that forced Japan to surrender is again directly related to physics.

Draw a circuit diagram used to compare the emf of two primary cells. For which girl is this equal to the actual length of the path skated? In interval 1: The slope of the speed-time graph is positive. How many dots are there if there are 8 rows? Give the equations for the linear and curved parts of the plot. Each step is 1 m long and requires 1 s. How then is current established almost the instant a circuit is closed.

She has 9 dots in a row. Verify that the graph shown in below figure correctly represents the time variation of the relative position of the second stone with respect to the first. The two quantities will be equal if the particle continues to move along a straight line. Thus, the basketball cannot be treated as a point object. However, it is negative in interval 3 because the slope is negative in this interval. Therefore, both position and velocity are positive. From the graph, it is clear that B overtakes A only once on the road.

Why is there no distinction required between instantaneous speed and magnitude of velocity? There are many other combinations which can give the sum zero. The assassin however is speeding off in a powerful sports car at 220 kmph in the same direction. The formulae in a , c and f correctly describe the motion of the particle in one dimension. Answer: a Displacement is given by the minimum distance between the initial and final positions of a body. A physical situation that resembles the above graph is of a freely falling body held for sometime at a height Question 3. In this case, the relative velocity of the ball with respect to the boy remains the same i.