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)
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)
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1 Answer
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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
Similar Questions for you
Please find the solution below:
after 10 kicks,
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
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
a? = v? ²/4r
a_A? = (v? ²/r²) × r = v? ²/r
a_A = 3v? ²/4r
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