MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
CBSE
Class 11 Physics
Laws Of Motion
Quiz 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
A string of negligible mass going over clamped pully of mass supports block of mass as shown in the figure. The force on the pully by clamp is given by
0%
$\sqrt{2}Mg$
0%
$\sqrt2mg$
0%
$\sqrt{\left(M+m\right)^2+m^2}g$
0%
$\sqrt{\left(M+m\right)^2+M^2}g$
When a bicycle is in motion, the force of friction exerted by ground on the two wheels is such that, it acts
0%
in the backward direction on the front wheel and in the forward direction on the rear wheel.
0%
in the forward direction on the front wheel and in the backward direction on the rear wheel.
0%
in the backward direction on both the front and the rear wheel.
0%
in the forward direction on both front and the rear wheels.
A rocket with a lift-off mass $3.5\times{10}^4Kg$ is blasted upwards with an initial acceleration of $10m/s^2$. Then the initial thrust blast is
0%
$3.5\times{10}^5N$
0%
$7.0\times{10}^5N$
0%
$14.0\times{10}^5N$
0%
$1.75\times{10}^5N$
5 The block of mass $M$ is pulled along a horizontal frictionless surface by a rope of mass $m$. If a force $P$ is applied at the free end of the rope, the force exerted by the rope on the block is
0%
$\frac{Pm}{\left(M+m\right)}$
0%
$\frac{Pm}{\left(M-m\right)}$
0%
$P$
0%
$\frac{PM}{\left(M+m\right)}$
Three forces start action simultaneously on a particle moving with velocity $\vec{v}$. These forces are Represented in magnitude and direction by the three sides of a triangle $ABC$ as shown in the figure. The particle will now move with velocity
0%
greater than $\vec{v}$
0%
$\left|\vec{v}\right|$ in the direction of the largest force $BC$
0%
$\vec{v}$ remaining unchanged
0%
less than $\vec{v}$
A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball is observed by the man in the lift and a man standing stationary on the ground are respectively.
0%
$g,g$
0%
$g-a, g-a $
0%
$g-a, g$
0%
$a,g$
A light spring balance hangs from the hook of the other light spring balance and a block of mass $M\, Kg$ hangs from the former one. Then the true statement about the scale reading is
0%
Both the scales read $M\, Kg$ each
0%
The scale of the lower one read $M\, Kg$ and of the upper one zero.
0%
The reading of the two scales can be anything but the sum of readings will be $M\, Kg$
0%
Both the scales read $M/2\, Kg$
A block rests on a rough inclined plane making an angle of ${30}^0$ with the horizontal. The coefficient of static friction between the block and the plane is $0.8$. If the frictional force on the block is $10\, N$, the mass of the block (in Kg) $\left(g=10m/s^2\right)$ is
0%
2.0
0%
4.0
0%
1.6
0%
2.5
A horizontal force of is necessary to just hold a block stationary against a wall. The coefficient Of friction between the block is 0.The weight of the block is
0%
20 N
0%
50 N
0%
100 N
0%
2 N
A smooth block is released at rest on a ${45}^0$ incline and then slides a distance $d$. The time taken to slide is $n$ times as much to slide on a rough incline than on a smooth incline. The coefficient of friction is
0%
$\mu_k=1-\frac{1}{n^2}$
0%
$\mu_k=\sqrt{1-\frac{1}{n^2}}$
0%
$\mu_s=1-\frac{1}{n^2}$
0%
$\mu_s=\sqrt{1-\frac{1}{n^2}}$
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that
0%
the velocity is constant
0%
its acceleration is constant
0%
its kinetic energy is constant
0%
it moves in a straight line
An annular ring with inner and outer radii $R_1$ and $R_2$ is rolling without slipping with a uniform angular speed. The ratio of the forces $F_1/F_2$ experienced by two identical particles situated on the inner and outer parts of the ring is
0%
$\frac{R_2}{R_1}$
0%
$\left(\frac{R_1}{R_2}\right)^2$
0%
$1$
0%
$\frac{R_1}{R_2}$
Two frictionless inclined planes making angles ${30}^0$ and ${60}^0$ with the vertical are shown in the figure. Two blocks A and B are placed on two planes What is the relative vertical acceleration of A with respect to B?
0%
$4.9m/s^2$ in vertical direction
0%
$4.9m/s^2$ in horizontal direction
0%
$9.8m/s^2$ in the vertical direction
0%
zero
Question 15 Which of the four arrangements in the figure correctly shows the vector addition of two forces $F_1$ and $F_2$ to yield the third force $F_3$
0%
a
0%
b
0%
c
0%
d
A body of mass 5 Kg starts from the origin with an initial velocity $\vec{u}=\left(30\hat{i}+40\hat{j}\right) m/s$. If a constant force $\left(-6\hat{i}-5\hat{j}\right)N$ acts on the body, the time in which y component of velocity becomes zero is
0%
5 s
0%
20 s
0%
40 s
0%
80 s
Three blocks of mass 2 Kg, 3Kg, 5 Kg are connected to each other with a light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force $F=10\, N$, then tension $T_1$ is
0%
1 N
0%
5 N
0%
8 N
0%
10 N
A particle is moving in a circle with uniform speed $v$. In moving from a point to another diametrically opposite point,
0%
the momentum changes by $mv$
0%
the momentum changes by $2mv$
0%
the kinetic energy changes by $\frac{1}{2}mv^2$
0%
the kinetic energy changes by $mv^2$
A person is sitting in a lift accelerating upwards. The measured weight of a person will be,
0%
less than actual weight
0%
equal to actual weight
0%
more than actual weight
0%
zero
Which of the following statements is true?
0%
velocity of light is constant in all media
0%
velocity of light in vacuum is maximum
0%
velocity of light is same in all reference frames
0%
Laws of nature have identical form in all reference frames.
In following question, a statement of assertion is followed by a statement of reason. Mark the correct choice. Assertion: A rocket moves forward by pushing surrounding air backwards. Reason: It derives the necessary thrust to move forward, according to Newton’s third law of motion.
0%
If both assertion and reason are true and reason is the correct explanation of assertion
0%
If both assertion and reason are true but reason is not correct explanation of assertion.
0%
If assertion is true and reason is false.
0%
If both assertion and reason are false.
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
Answered
0
Not Answered
0
Not Visited
Correct : 0
Incorrect : 0
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page