4.23 For any arbitrary motion in space, which of the following relations are true:

(a) V average = (1/2) (v (t1) + v (t2))

(b) V average = [r (t2) - r (t1)] / (t2 – t1)

(c) V (t) = v (0) + a t

(d) R (t) = r (0) + v (0) t + (1/2) a t2

(e) A average = [v (t2) - v (t1)] / (t2 – t1)

(The ‘average’ stands for average of the quantity over the time interval t1 to t2)

0 93 Views | Posted 4 months ago
Asked by Shiksha User

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    Answered by

    Vishal Baghel | Contributor-Level 10

    4 months ago

    4.23

    (a) For any arbitrary motion of a particle average velocity cannot be expressed by this equation. False

     

    (b) The arbitrary motion of the particle can be represented by this equation, True

     

    (c) For arbitrary motion of the particle, the acceleration may also be non uniform. False

     

    (d) The motion of the particle is arbitrary, acceleration of the particle may also be non-uniform, so can not represent the motion of the particle in space. False

     

    (e) The arbitrary motion of the particle can be represented by the given equation. True

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A
alok kumar singh

Please find the solution below:

 

 

 

V
Vishal Baghel

  a = v 0 2 R

after 10 kicks, v = v 0 + 1 0 v 0 1 0 0 = 1 . 1 v 0

R 1 = 1 . 2 1 R

 

V
Vishal Baghel

v? = 3tî v? = 24cos 60°î + 24sin 60°? = 12î + 12√3?
v? = v? – v? = (12 – 3t)î + 12√3?
It is minimum when 12 - 3t = 0 ⇒ t = 4sec

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Vishal Baghel

ω = θ² + 2θ
α = (ωdω)/dθ = (θ² + 2θ) (2θ + 2)
At θ = 1rad.
ω = 3rad/s and α = 12rad/s²
a? = αR = 12 m/s² a? = ω²R = 9 m/s² A? = √ (a? ² + a? ²) = 15 m/s²

V
Vishal Baghel

a? = v? ²/4r
a_A? = (v? ²/r²) × r = v? ²/r
a_A = 3v? ²/4r

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