MCQ
The acceleration of $10\, kg$ block when $F = 30\,N$ ........ $m/s^2$
  • $2$
  • B
    $3$
  • C
    $1$
  • D
    None

Answer

Correct option: A.
$2$
a
$\mathrm{F}-\mathrm{F}_{1} \mathrm{max}=10 \mathrm{a}$

$\mathrm{F}-10=10 \mathrm{a}$

or $30-10=10 \mathrm{a}$

$\therefore a=\frac{20}{10}=2 \mathrm{m} / \mathrm{s}^{2}$

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

Similar questions

Two inclined planes are placed as shown in figure.

A block is projected from the Point $A$ of inclined plane $A B$ along its surface with a velocity just sufficient to carry it to the top Point $B$ at a height $10 m$. After reaching the Point $B$ the block slides down on inclined plane $BC$. Time it takes to reach to the point $C$ from point $A$ is $t (\sqrt{2}+1) s$. The value of $t$ is........(use $g =10 m / s ^{2}$ )

Trajectory of particle in a projectile motion is given as $y=x-\frac{x^2}{80}$. Here, $x$ and $y$ are in metre. For this projectile motion match the following with $g=10\,m / s ^2$.
$Column-I$ $Column-II$
$(A)$ Angle of projection $(p)$ $20\,m$
$(B)$ Angle of velocity with horizontal after $4\,s$ $(q)$ $80\,m$
$(C)$ Maximum height $(r)$ $45^{\circ}$
$(D)$ Horizontal range $(s)$ $\tan ^{-1}\left(\frac{1}{2}\right)$
A steel tape gives correct measurement at $20^o C$. A piece of wood is being measured with the steel tape at $0^o C$. The reading is $25 \,\,cm$ on the tape, the real length of the given piece of wood must be:
A body of mass $m$ is thrown upwards at an angle $\theta$ with the horizontal with velocity $v$. While rising up the velocity of the mass after $ t$ seconds will be
A mass m is moving with a constant velocity along a line parallel to the x-axis away from the origin. Its angular momentum w.r.t. the origin is:
An ice block is melting at a constant rate $\left| {\,\frac{{dm}}{{dt}}\,} \right|= \mu$ . Its initial mass is $m_0$ and it is moving with velocity on a frictionless horizontal surface. The distance travelled by it till it melts completely is :
The amplitude modulated (AM) radio wave bends appreciably round the corners of a 1m × 1m board but the frequency modulated (FM) wave only negligibly bends. If the average wavelengths of AM and FM waves are $\lambda_\text{a}$ and $\lambda_\text{f}:$

  1. $\lambda_\text{a}>\lambda_\text{f}$

  2. $\lambda_\text{a}=\lambda_\text{f}$

  3. $\lambda_\text{a}<\lambda_\text{f}$

  4. We don't have sufficient information to decide about the relation of $\lambda_\text{a}$ and $\lambda_\text{f}$

A rocket of mass $1000 \,kg $ exhausts gases at a rate of $4\, kg/sec$ with a velocity $3000 \,m/s$. The thrust developed on the rocket is ........ $N$
If two moles of diatomic gas and one mole of mono atomic gas are mixed then the ratio of specific heats is
An object is projected from ground with speed $u$ at angle $\theta$ with horizontal. the radius of curvature of its trajectory at maximum height from ground is ..........