Download App

STD 11 - 2. motion in straight line — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 2. motion in straight line4 Marks
MCQ
A body initially at rest is moving with uniform acceleration $a$ . Its velocity after $n$ seconds is $v$ . The displacement of the body in last $2\,s$ is
  • ✓
    $\frac{{2v(n - 1)}}{n}$
  • B
    $\frac{{v(n - 1)}}{n}$
  • C
    $\frac{{v(n + 1)}}{n}$
  • D
    $\frac{{2v(n + 1)}}{n}$
✓

Answer

Correct option: A.
$\frac{{2v(n - 1)}}{n}$
a
Here, $a=\frac{v-u}{t}=\frac{v-0}{n}=\frac{v}{n}$

Displacement in last $2\, s$

$\mathrm{S}_{\mathrm{n}}-\mathrm{S}_{\mathrm{n}-2}=\frac{1}{2} \mathrm{an}^{2}-\frac{1}{2} \mathrm{a}(\mathrm{n}-2)^{2}$

${=2 \mathrm{a}(\mathrm{n}-1)=2 \frac{\mathrm{v}}{\mathrm{n}}(\mathrm{n}-1)}$

${=\frac{2 \mathrm{v}(\mathrm{n}-1)}{\mathrm{n}}}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Tischenko reaction is a modification of
→
A particle of mass $m$ and charge $q$ enters a region of magnetic field (as shown) with speed $v$. There is a region in which the magnetic field is absent, as shown. The particle after entering the region collides elas tically with a rigid wall. Time after which the velocity of particle becomes anti parallel to its initial velocity is
→
A chain is on a frictionless table with one fifth of its length hanging over the edge. If the chain has length $L$ and mass $M$, the work required to be done to pull the hanging part back onto the table is
→
A conducting body $1$ has some initial charge $Q$, and its capacitance is $C$. There are two other conducting bodies, $2$ and $3$, having capacitances : $C_2 = 2C$ and $C_3 \rightarrow \infty$ . Bodies $2 $ and $3 $ are initially uncharged. "Body $2$ is touched with body $1$. Then, body $2$ is removed from body $1 $ and touched with body $3$, and then removed." This process is repeated $N$ times. Then, the charge on body $1$ at the end must be
→
The magnetic field in a plane electromagnetic wave is given by, $B=3.01 \times 10^{-7} \sin \left(6.28 \times 10^2 \times+2.2 \times 10^{10} t\right) \,T$. [where $x$ in $cm$ and $t$ in second]. The wavelength of the given wave is ....... $cm$
→
A metallic square loop $ABCD$ is moving in its own plane with velocity $v$ in a uniform magnetic field perpendicular to its plane as shown in the figure. Electric field is induced 
→
At some temperature $T$, a bronze pin is a little large to fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when
→
Equation of a progressive wave is given by $y = 0.2\cos \pi \left( {0.04t + 0.02x - \frac{\pi }{6}} \right)$The distance is expressed in $cm$ and time in second. What will be the minimum distance between two particles having the phase difference of $\pi /2$ ...... $cm$
→
Consider the conducting square loop shown in figure. If the switch is closed and after some time it is opened again, then the square loop will show
→
Two short magnets of magnetic moment $1000$ $A{m^2}$ are placed as shown at the corn ers of a square of side $10\, cm$. The net magnetic induction at $P$ is....$T$
→