Chapter 2: Problem 169
Frame of reference is a \(\ldots\) and a ... from where an observer takes his observation, (A) place, size (B) size, situation (C) situation, size (D) place, situation
Chapter 2: Problem 169
Frame of reference is a \(\ldots\) and a ... from where an observer takes his observation, (A) place, size (B) size, situation (C) situation, size (D) place, situation
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Get started for freeIn a uniformly accelerated motion the slope of velocity - time graph gives .... (A) The instantaneous velocity (B) The acceleration (C) The initial velocity (D) The final velocity
If \(\mathrm{A}^{\rightarrow}=3 \hat{1}+4 \hat{\jmath}+9 \mathrm{k}\) is multiplied by 3 , then the component of the new vector along \(\mathrm{z}\) direction is .. (A) \(-3\) (B) \(+3\) \(\begin{array}{ll}\text { (C) }-27 & \text { (D) }+27\end{array}\)
\(x\) and y co-ordinates of a particle moving in \(\mathrm{x}-\mathrm{y}\) plane at some instant are \(\mathrm{x}=2 \mathrm{t}^{2}\) and $\mathrm{y}=(3 / 2) \mathrm{t}^{2}\( Calculate y co-ordinate when its \)\mathrm{x}\( coordinate is \)8 \mathrm{~m}$. (A) \(3 \mathrm{~m}\) (B) \(6 \mathrm{~m}\) (C) \(8 \mathrm{~m}\) (D) \(9 \mathrm{~m}\)
A car covers one third part of its straight path with speed \(\mathrm{V}_{1}\) and the rest with speed \(\mathrm{V}_{2}\). What is its average speed? (A) $\left[\left(3 \mathrm{v}_{1} \mathrm{v}_{2}\right) /\left(2 \mathrm{v}_{1}+\mathrm{v}_{2}\right)\right]$ (B) $\left[\left(2 \mathrm{v}_{1} \mathrm{v}_{2}\right) /\left(3 \mathrm{v}_{1}+\mathrm{v}_{2}\right)\right]$ (C) $\left[\left(3 \mathrm{v}_{1} \mathrm{v}_{2}\right) /\left(\mathrm{v}_{1}+2 \mathrm{v}_{2}\right)\right]$ (D) $\left[\left(3 \mathrm{v}_{1} \mathrm{v}_{2}\right) /\left(2 \mathrm{v}_{1}+2 \mathrm{v}_{2}\right)\right]$
A particle is projected with initial speed of \(\mathrm{V}_{0}\) and angle of \(\theta\). Find the horizontal displacement when its velocity is perpendicular to initial velocity. (A) $\left[\left(\mathrm{V}_{0}^{2}\right) /(\operatorname{gtan} \theta)\right]$ (B) \(\left[\left(\mathrm{V}_{0}^{2}\right) /(\mathrm{g} \sin \theta)\right]\) (C) \(\left[\left(\mathrm{V}_{0} \sin \theta\right) / \mathrm{g}\right]\) (D) \(\left[\left(\mathrm{V}_{0}^{2}\right) /(\tan \theta)\right]\)
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