Download App

STD 11 - 3.2 , motion in plane — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 3.2 , motion in plane4 Marks
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

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

Similar questions

A man of mass $80\ kg$ is standing inside a lift moving upward with a uniform velocity of $4\ m/s$ then the apparent weight of the person will be
→
If the value of resistance is $10.845 \,ohm$ and the value of current is $3.23 \,amp$, the value of potential with significant numbers would be ........... $volt$
→
For the given figures, choose the correct options:
→
Consider the wall of a dam to be straight with height $H$ and length $L$. It holds a lake of water of height $h (h < H)$ on one side. Let the density of water be $\rho_{ w }$. Denote the torque about the axis along the bottom length of the wall by $\tau_1$. Denote also a similar torque due to the water up to height $h / 2$ and wall length $L / 2$ by $\tau_2$. Then $\tau_1 / \tau_2$ (ignore atmospheric pressure) is
→
A gardener holds a hosepipe through which water is gushing out at a rate of $4\,kg\, s^{-1}$ with speed $2\, ms^{-1}$. The moment the speed of water is increased to $3\, ms^{-1}$, the gardener will experience a jerk of
→
In figure, two blocks $M$ and $m$ are tied together with an inextensible and light string. The mass $M$ is placed on a rough horizontal surface with coefficient of friction $\mu$ and the mass $m$ is hanging vertically against a smooth vertical wall. The pulley is frictionless. When the downward acceleration of the elevator becomes equal to $g$, then
→
A charge $q$ is moving in a magnetic field then the magnetic force does not depend upon
→
A source of sound emits $200\pi W$ power which is uniformly distributed over a sphere of $10 m$ radius. What is the loudness of sound on the surface of a sphere
→
An open pipe is in resonance in its $2^{nd}$ harmonic with tuning fork of frequency ${f_1}$. Now it is closed at one end. If the frequency of the tuning fork is increased slowly from ${f_1}$ then again a resonance is obtained with a frequency ${f_2}$. If in this case the pipe vibrates ${n^{th}}$ harmonics then
→
On a smooth plane surface $($figure$)$ two block $A$ and $B$ are accelerated up by applying a force $15\, N$ on $A$. If mass of $B$ is twice that of $A$, the force on $B$ is $.......... N$
→