Home
Class 11
PHYSICS
Two particle A and B start moving due to...

Two particle A and B start moving due to their mutual interaction only. If at any tiem 't', `vec(a)_(A)` and `vec(a)_(B)` are their respective accelerations, `vec(v)_(A)` and `vec(v)_(B)` are their respective velocities, and upto that time `W_(A)` and `W_(B)` are the work done on A and B respectively by the mutual force, `m_(A)` and `m_(B)` are their masses respectively, then which of the following is alwys correct.

A

`vec(v)_(A) + vec(v)_(B) = 0`

B

`m_(A) vec(v)_(A) + m_(B)vec(v)_(B) = 0`

C

`W_(A) + W_(B) = 0`

D

`vec(a)_(A) + vec(a)_(B) = 0`

Text Solution

Verified by Experts

The correct Answer is:
B
In the absence of external forces, the linear momentum of the system remains constant.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CENTRE OF MASS

    ALLEN|Exercise EXERCISE-III|42 Videos

  • CENTRE OF MASS

    ALLEN|Exercise EXERCISE-IV A|32 Videos

  • CENTRE OF MASS

    ALLEN|Exercise EXERCISE-I|40 Videos

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise EXERCISE-IV ASSERTION & REASON|11 Videos

  • ELASTICITY, SURFACE TENSION AND FLUID MECHANICS

    ALLEN|Exercise Exercise 5 B (Integer Type Questions)|3 Videos

Similar Questions

Explore conceptually related problems

Let vec( a) _(1) and vec( a) _(2) are the acceleration of wedges A and B. Let vec(b)_(1) and vec(b)_(1) be the accelerations of C and D relative to wedges A and B respectively. Choose the right relation :

Let vec(a) and vec(b) be the position vectors of A and B respectively. If C is the point 3 vec(a) - 2vec(b) , then which one of the following is correct?

Knowledge Check

  • If |vec(a)+vec(b)|=|vec(a)-vec(b)| , then which one of the following is correct?

    A
    `vec(a)` is parallel to `vec(b)`
    B
    `vec(a)` is perpendicular to `vec(b)`
    C
    `vec(a)=vec(b)`
    D
    Both `vec(a) and vec(b)` are unit vectors

  • If vec(a)xx vec(b) = vec(c) and vec(b) xx vec(c) = vec(a) , then which one of the following is correct?

    A
    `vec(a),vec(b),vec(c)` are orthogonal in pairs and `|vec(a)|=|vec(c)| and |vec(b)|=1`
    B
    `vec(a),vec(b),vec(c)` are non-orthogonal to each other
    C
    `vec(a), vec(b), vec(c)` are orthogonal in pairs but `|vec(a)|!=|vec(c)|`
    D
    `vec(a), vec(b), vec(c)` are orthogonal is pairs but `|vec(b)|!=1`

  • If vec(a). vec(b) = 0 and vec(a) xx vec(b) = vec(0) then which one of the following is correct ?

    A
    `vec(a)` is parallel to `vec(b)`
    B
    `vec(a) ` is perpendicular to `vec(b)`
    C
    `vec(a)=vec(0) or vec(b)=vec(0)`
    D
    None of the above

    • Similar Questions

    Explore conceptually related problems

    If vec(a) xx vec(b) xx vec(c ) and vec(b) xx vec(c ) xx vec(a) , then which one of the following is correct?

    Let vec(a) and vec(b) be the position vectors of A and B respectively. If C is the point 3 vec(a)-2vec(b) , then which one of the following is correct?

    Two particles A and B, move with constant velocities vec(v_(1))" and "vec(v_(2)) . At the initial moment their position vectors are vec(r_(1))" and "vec(r_(2)) respectively. The condition for particle A and B for their collision is

    If magnitudes of vectors vec(A), vec(B) and vec(C) are 5, 4 and 3 units respectively and, vec(A) = vec(B) + vec(C) then angle between vec(A) and vec(B) is

    If vec(a) and vec(b) are two vectors such that vec(a).vec(b) = 0 and vec(a) xx vec(b) = 0 , then which one of the following is correct?

    Home
    Profile