Download App

3.2 , motion in plane — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics3.2 , motion in plane1 Mark
MCQ
Balls $A$ and $B$ are thrown from two points lying on the same horizontal plane separated by a distance $120\,m$. Which of the following statement$(s)$ is/are correct.
  • A
    The two balls can never meet
  • B
    The balls can meet, if the ball $B$ is thrown $1\,s$ later
  • ✓
    The two balls meet at a height of $45\,m$
  • D
    None of the above
✓

Answer

Correct option: C.
The two balls meet at a height of $45\,m$
c
(c)

Two balls will meet if,

$\left(50 \cos 37^{\circ}\right) t_A=120 \text { or } t_A=3\,s$

Vertical component of $A$ is also $50 \sin 37^{\circ}$ or $30\,m / s$, so they will meet if thrown simultaneously.

$h_A=h_B$

$=30 \times 3-\frac{1}{2} \times 10 \times(3)^2$

$=45\,m$

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

More "M.C.Q (1 Marks)" from 3.2 , motion in plane→3.2 , motion in plane — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

On a solid sphere lying on a horizontal surface a force $F$ is applied at a height of $R/2$ from the centre of mass. The initial acceleration of a point at the top of the sphere is (there is no slipping at any point)
→
In an experiment to determine the period of a simple pendulum of length $1\, m$, it is attached to different spherical bobs of radii $r_1$ and $r_2$ . The two spherical bobs have uniform mass distribution. If the relative difference in the periods, is found to be $5\times10^{-4}\, s$, the difference in radii, $\left| {{r_1} - {r_2}} \right|$ is best given by .... $cm$
→
Two persons of masses $55\, kg$ and $65\, kg$ respectively, are at the opposite ends of a boat. The length of the boat is $3.0\, m$ and weighs $100\, kg.$ The $55\, kg$ man walks up to the $65\, kg$ man and sits with him. If the boat is in still water the center of mass of the system shifts by ....... $m$
→
The power of a pump, which can pump $200kg$ of water to a height of $200m$  in $10sec $ is ................ $kW$ $(g = 10m/{s^2})$
→
A source of sound emitting a note of frequency $200 Hz$ moves towards an observer with a velocity $v$ equal to the velocity of sound. If the observer also moves away from the source with the same velocity $v$, the apparent frequency heard by the observer is .... $Hz$
→
A student in the laboratory measures thickness of a wire using screw gauge. The readings are $1.22\,mm , 1.23\,mm , 1.19\,mm$ and $1.20\,mm$. The percentage error is $\frac{ x }{121} \%$. The value of $x$ is ..............
→
Gravitational potential at the centre of curvature of a hemispherical bowl of radius $R$ and mass $M$ is $V.$
→
One solid sphere and disc of same radius are falling along an inclined plane without slipping. One reaches earlier than the other due to
→
Two balls $A$ and $B$ are thrown with same velocity $u$ from the top of a tower. Ball $A$ is thrown vertically upwards and the ball $B$ is thrown vertically downwards. If $t_A = 6\  s$ and $t_B = 2\ s$ then velocity $u$ of each ball is.......$ms^{^{-1}}$
→
$A$ ring rolls without slipping on the ground. Its centre $C$ moves with a constant speed $u. P$ is any point on the ring. The speed of $P$ with respect to the ground is ?.
→