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Give Example Where the Velocity is Perpendicular to the Acceleration. - Physics

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प्रश्न

Give example where the velocity is perpendicular to the acceleration.

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उत्तर

At the highest point of a full projectile.

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पाठ 3: Rest and Motion: Kinematics - Short Answers [पृष्ठ ४८]

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एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
पाठ 3 Rest and Motion: Kinematics
Short Answers | Q 10.3 | पृष्ठ ४८

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

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

A particle in one-dimensional motion with positive value of acceleration must be speeding up.


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?


If a particle is accelerating, it is either speeding up or speeding down. Do you agree with this statement?


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


 In figure shows the x coordinate of a particle as a function of time. Find the sings of vx and ax at t = t1, t = t2 and t = t3.


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


An object having a velocity 4.0 m/s is accelerated at the rate of 1.2 m/s2 for 5.0 s. Find the distance travelled during the period of acceleration. 

 

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)


If the velocity of a car is given by V = (150 − 10x)½ m/s. If a car retards their motion by applying brakes then what will be the acceleration?


A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct?


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?


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