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255 Questions Start Errorless Test
All Exams Allen Advance Errorless
IIT-JEE 2007 Q176 Errorless 9. JEE Section MCQ
Statement-1 : A table cloth can be pulled from a table without dislodging the dishes. Statement-2 : To every action there is an equal and opposite reaction.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
CBSE PMT 2007 Q177 Errorless 12. Kinetic Friction MCQ
A block B is pushed momentarily along a horizontal surface with an initial velocity V. If $\mu$ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time
A.
$V / (g\mu)$
B.
$g\mu /V$
C.
$g / V$
D.
$V / g$
J & K CET 2006 Q178 Errorless 2. Second Law of Motion MCQ
Which of the following quantities measured from different inertial reference frames are same
A.
Force
B.
Velocity
C.
Displacement
D.
Kinetic energy
KCET 2006 Q179 Errorless 2. Second Law of Motion MCQ
For ordinary terrestrial experiments, the observer is an inertial frame in the following cases is
A.
A child revolving in a giant wheel
B.
A driver in a sports car moving with a constant high speed of $200\mathrm{kmh}^{-1}$ on a straight rod
C.
The pilot of an aeroplane which is taking off
D.
A cyclist negotiating a sharp curve
BHU 2006 Q180 Errorless 4. Conservation of Linear Momentum and Impulse MCQ
In the first second of its flight, rocket ejects 1/60 of its mass with a velocity of $2400~\mathrm{ms}^{-1}$ . The acceleration of the rocket is
A.
$19.6~\mathrm{ms}^{-2}$
B.
$30.2~\mathrm{ms}^{-2}$
C.
$40~\mathrm{ms}^{-2}$
D.
$49.8~\mathrm{ms}^{-2}$
J & K CET 2006; Kerala PMT 2009 Q181 Errorless 4. Conservation of Linear Momentum and Impulse MCQ
A large force is acting on a body for a short time. The impulse imparted is equal to the change in
A.
Acceleration
B.
Momentum
C.
Energy
D.
Velocity
E.
Displacement
DCE 2006 Q182 Errorless 6. Motion of Connected Bodies MCQ
A block of mass $M$ is attached to the lower end of a vertical rope of mass $m$ . An upward force $P$ acts on the upper end of the rope. The system is free to move. The force exerted by the rope on the block is $\frac{PM}{M + m}$
A.
In all cases
B.
Only if the rope is uniform
C.
In gravity-free space only
D.
Only if $P > (M + m)g$
DCE 2006 Q183 Errorless 6. Motion of Connected Bodies MCQ
In the arrangement shown, the pulleys are fixed and ideal, the strings are light, $m_{1} > m_{2}$ and $S$ is a spring balance which is itself massless. The reading of $S$ (in unit of mass) is
A.
$m_1-m_2$
B.
$\frac{1}{2}(m_1+m_2)$
C.
$\frac{m_1m_2}{m_1+m_2}$
D.
$\frac{2m_1m_2}{m_1+m_2}$
IIT-JEE 2006; NEET 2017 Q184 Errorless 6. Motion of Connected Bodies MCQ
Two blocks $A$ and $B$ of masses $2m$ and $m$ , respectively, are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in the figure. The magnitudes of acceleration of $A$ and $B$ , immediately after the string is cut, are respectively
A.
g, g/2
B.
g/2, g
C.
g, g
D.
g/2, g/2
AIIMS 2006 Q185 Errorless 7. Critical Thinking MCQ
If a street light of mass $M$ is suspended from the end of a uniform rod of length $L$ in different possible patterns as shown in figure, then (A) (B) (C)
A.
Pattern A is sturdier
B.
Pattern B is sturdier
C.
Pattern C is sturdier
D.
All will have same sturdiness
MP PET 2006; JEE (Main) 2018 Q186 Errorless 11. Static and Limiting Friction MCQ
Two masses A and B of 10 kg and 5 kg respectively are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown. The coefficient of static friction of A with table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is
A.
15 kg
B.
10 kg
C.
5 kg
D.
12 kg
BHU 2006 Q187 Errorless 12. Kinetic Friction MCQ
A body moves along a circular path of radius 10m and the coefficient of friction is 0.5. What should be its angular speed in rad/s if it is not to slip from the surface (g=9.8 msĀ²)
A.
5
B.
10
C.
0.1
D.
0.7
BCECE 2005; JEE (Main) April 2024 Q188 Errorless 2. Second Law of Motion MCQ
A ball of mass m moves with speed v and it strikes normally with a wall and reflected back normally, if its time of contact with wall is t then find force exerted by ball on wall
A.
$\frac{2mv}{t}$
B.
$\frac{mv}{t}$
C.
mut
D.
$\frac{mv}{2t}$
KCET 2005 Q189 Errorless 2. Second Law of Motion MCQ
The adjacent figure is the part of a horizontally stretched net. section $AB$ is stretched with a force of $10N$ . The tensions in the sections $BC$ and $BF$ are $\left|E\right.$
A.
10N, 11N
B.
10N, 6N
C.
10N, 10N
D.
Can't calculate due to insufficient data
J & K CET 2005 Q190 Errorless 3. Third Law of Motion MCQ
A man is standing at the centre of frictionless pond of ice. How can he get himself to the shore
A.
By throwing his shirt in vertically upward direction
B.
By spitting horizontally
C.
He will wait for the ice to melt in pond
D.
Unable to get at the shore
KCET 2005 Q191 Errorless 3. Third Law of Motion MCQ
A student attempts to pull himself up by tugging on his hair. He will not succeed
A.
As the force exerted is small
B.
The frictional force while gripping, is small.
C.
Newton's law of inertia is not applicable to living beings.
D.
As the force applied is internal to the system.
Odisha JEE 2005 Q192 Errorless 4. Conservation of Linear Momentum and Impulse MCQ
For a body moving with relativistic speed, if the velocity is doubled, then
A.
Its linear momentum is doubled
B.
Its linear momentum will be less than double
C.
Its linear momentum will be more than double
D.
Its linear momentum remains unchanged
AIEEE 2005; NEET 2018 Q193 Errorless 5. Equilibrium of Forces MCQ
A block is kept on a frictionless inclined surface with angle of inclination 'a'. The incline is given an acceleration 'a' to keep the block stationary. Then a is equal to
A.
$g$
B.
$g\tan \alpha$
C.
$g / \tan \alpha$
D.
$g\operatorname {cosec}\alpha$
AIIMS 2005; AMU (Engg.) 2012 Q194 Errorless 8. Graphical Questions MCQ
In the figure given below, the position-time graph of a particle of mass 0.1 kg is shown. The impulse at t = 2 sec is
A.
0.2 kg m sec $^{-1}$
B.
$-0.2\mathrm{kg}m\sec^{-1}$
C.
0.1 kg m sec $^{-1}$
D.
-0.4 kg m sec $^{-1}$
CBSE PMT 2004 Q195 Errorless 2. Second Law of Motion MCQ
A block of mass m is placed on a smooth wedge of inclination $\theta$ . The whole system is accelerated horizontally so that the block does not slip on the wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be
A.
mg cos $\theta$
B.
mg sin $\theta$
C.
mg
D.
mg / cos $\theta$
Pb. PET 2004 Q196 Errorless 3. Third Law of Motion MCQ
When a horse pulls a wagon, the force that causes the horse to move forward is the force
A.
The ground exerts on it
B.
It exerts on the ground
C.
The wagon exerts on it
D.
It exerts on the wagon
AIEEE 2004; Kerala PMT 2007 Q197 Errorless 4. Conservation of Linear Momentum and Impulse MCQ
A machine gun fires a bullet of mass 40 g with a velocity $1200 \, ms^{-1}$ . The man holding it can exert a maximum force of 144 N on the gun. How many bullets can he fire per second at the most
A.
One
B.
Four
C.
Two
D.
Three
DCE 2004 Q198 Errorless 5. Equilibrium of Forces MCQ
If two forces of $5N$ each are acting along $X$ and $Y$ axes, then the magnitude and direction of resultant is
A.
$5\sqrt{2}, \pi/3$
B.
$5\sqrt{2}, \pi/4$
C.
$-5\sqrt{2}, \pi/3$
D.
$-5\sqrt{2}, \pi/4$
CBSE PMT 2004; Odisha PMT 2004 Q199 Errorless 11. Static and Limiting Friction MCQ
The coefficient of static friction, $\mu_{s}$ , between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless ( $g = 10 \, m/s^{2}$ )
A.
$2.0\mathrm{kg}$
B.
$4.0\mathrm{kg}$
C.
$0.2\mathrm{kg}$
D.
$0.4\mathrm{kg}$
AIEEE 2004; KCET 2018 Q200 Errorless 13. Motion on Inclined Surface MCQ
A block rests on a rough inclined plane making an angle of $30^{\circ}$ 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 $10N$ , the mass of the block (in kg) is (take $g = 10m / s^{2}$ )
A.
2.0
B.
4.0
C.
1.6
D.
2.5