Class 11 Physics NCERT Solutions Chapter 3 - Motion in a Straight LineShare
NCERT solutions for Class 11 Physics Chapter 3 Motion in a Straight Line have been made available here to assist students to prepare the Chapter thoroughly. These Solutions for the Chapter - Motion in a Straight Line comprise of well-researched answers to the short as well long questions. Further, these Solutions have been presented in an easy to understand language to assist students to prepare the Chapter in a quick time.
Our NCERT Solutions for the Chapter Motion in a Straight Line have been prepared by an experienced team of teachers in compliance with the CBSE syllabus. Moreover, our subject experts have reviewed these NCERT Solutions properly to provide you with the error-free and effective study material for Physics exam preparation.
Following are the important topics discussed in our NCERT Solutions for Chapter 3 - Motion in a Straight Line:
- Position, path length, and displacement
- Average velocity and average speed
- Instantaneous velocity and speed
- Kinematic equations for uniformly accelerated motion
- Relative velocity.
Class 11 Physics NCERT Solutions Chapter 3 - Motion in a Straight Line
In which of the following examples of motion, can the body not 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.
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).
A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward, followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 m long and requires 1 s. Plot the x-t graph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start.
Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km/h in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 ms-2. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?
On a two-lane road, car A is travelling with a speed of 36 km/h. Two cars B and C approach car A in opposite directions with a speed of 54 km/h each. At a certain instant, when the distance AB is equal to AC, both being 1 km, B decides to overtake A before C does. What minimum acceleration of car C is required to avoid an accident?
Two towns A and B are connected by a regular bus service with a bus leaving in either direction every T minutes. A man cycling with a speed of 20 km/h in the direction A to B notices that a bus goes past him every 18 min in the direction of his motion, and every 6 min in the opposite direction. What is the period T of the bus service and with what speed (assumed constant) do the buses ply on the road?
A player throws a ball upwards with an initial speed of 29.4 m/s.
(a) What is the direction of acceleration during the upward motion of the ball?
(b) What are the velocity and acceleration of the ball at the highest point of its motion?
(c) Choose the x = 0 m and t = 0 s to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of x-axis, and give the signs of position, velocity and acceleration of the ball during its upward, and downward motion.
(d) To what height does the ball rise and after how long does the ball return to the player’s hands? (Take g = 9.8 ms-2 and neglect air resistance).
|Chapter 1 - Physical World|
|Chapter 2 - Units and Measurements|
|Chapter 3 - Motion in a Straight Line|
|Chapter 4 - Motion in a Plane|
|Chapter 5 - Laws of Motion|
|Chapter 6 - Work, Energy and Power|
|Chapter 7 - System of Particles and Rotational Motion|
|Chapter 8 - Gravitation|