English

Read the statement below carefully and state, with reason and example, if it is true or false: A particle in one-dimensional motion with constant speed must have zero acceleration. - Physics

Advertisements
Advertisements

Question

Read the statement below carefully and state, with reason and example, if it is true or false:

A particle in one-dimensional motion with constant speed must have zero acceleration.

Options

  • True

  • False

MCQ
True or False

Solution

This statement is True.

Explanation:

A car moving on a straight highway with constant speed will have constant velocity. Since acceleration is defined as the rate of change of velocity, the acceleration of the car is also zero.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Motion in a Straight Line - Exercises [Page 57]

APPEARS IN

NCERT Physics [English] Class 11
Chapter 3 Motion in a Straight Line
Exercises | Q 11.3 | Page 57

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

The given figure gives a speed-time graph of a particle in motion along a constant direction. Three equal intervals of time are shown. In which interval is the average acceleration greatest in magnitude? In which interval is the average speed greatest? Choosing the positive direction as the constant direction of motion, give the signs of v and a in the three intervals. What are the accelerations at the points A, B, C and D?


Give example where  the velocity of a particle is zero but its acceleration is not zero.


Give example where the velocity is opposite in direction to the acceleration.


Give example where the velocity is perpendicular to the acceleration.


A stone is released from an elevator going up with an acceleration a. The acceleration of the stone after the release is 


The accelerations of a particle as seen from two frames S1 and S2 have equal magnitude 4 m/s2.


The displacement of particle is given by x = `2/lambda (1 - e^(-lambdat))`, the acceleration of particle at 2s when λ = 2s–1 will be (Take `l`n 0.018 = – 4)


A graph of x versus t is shown in figure. Choose correct alternatives from below.

  1. The particle was released from rest at t = 0.
  2. At B, the acceleration a > 0.
  3. At C, the velocity and the acceleration vanish.
  4. Average velocity for the motion between A and D is positive.
  5. The speed at D exceeds that at E.

Give example of a motion where x > 0, v < 0, a > 0 at a particular instant.


An object falling through a fluid is observed to have acceleration given by a = g – bv where g = gravitational acceleration and b is constant. After a long time of release, it is observed to fall with constant speed. What must be the value of constant speed?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×