Class 11 Physics Important Chapter 3 Motion on a Straight Line Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 11 Physics Important Solutions and select need one. AHSEC Class 11 Physics Additional Notes English Medium Download PDF. HS 1st Year Physics Important Solutions in English.
Class 11 Physics Important Chapter 3 Motion on a Straight Line
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. NCERT Class 11 Physics Additional Question Answer are part of All Subject Solutions. Here we have given HS 1st Year Physics Important Notes in English for All Chapters, You can practice these here.
Motion on a Straight Line
Chapter: 3
| IMPORTANT QUESTION AND ANSWER |
Answer the Following Questions:
1. What is motion?
Ans: Motion is the change in position of an object with respect to time.
2. Define instantaneous velocity.
Ans: Instantaneous velocity is the velocity of an object at a particular instant of time, given by the derivative dx/dt.
3. How is average velocity different from instantaneous velocity?
Ans: Average velocity is displacement divided by total time over an interval, while instantaneous velocity is velocity at a specific instant.
4. What is acceleration?
Ans: Acceleration is the rate of change of velocity with time.
5. What are the SI units of velocity and acceleration?
Ans: Velocity is measured in meters per second (m/s) and acceleration in meters per second squared (m/s²).
6. Write the equation relating velocity, acceleration, and time for uniformly accelerated motion.
Ans: v = v0 + at.
7. What does the area under a velocity-time graph represent?
Ans: The displacement of the object.
8. What is the difference between speed and velocity?
Ans: Speed is the magnitude of velocity and has no direction; velocity has both magnitude and direction.
9. What does negative acceleration indicate?
Ans: It indicates the object is slowing down or decelerating.
10. What assumptions are made in studying rectilinear motion in this chapter?
Ans: Objects are treated as point particles, and acceleration is uniform.
11. State the three kinematic equations for constant acceleration.
Ans: (i) v = v0 + at
(ii) x = v0t + 1/2at2
(iii) v2 = v20+ 2ax
12. Explain free fall motion.
Ans: Free fall is motion under gravity alone, with acceleration a = − ga directed downward.
13. Why does the velocity-time graph for constant velocity appear as a straight line parallel to the time axis?
Ans: Because velocity is constant and does not change with time.
14. What is relative velocity?
Ans: Relative velocity is the velocity of an object as observed from another moving object.
15. How is acceleration graphically represented on a velocity-time graph?
Ans: As the slope of the velocity-time graph.
16. What happens to the acceleration if the velocity remains constant?
Ans: Acceleration is zero.
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