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293 Questions Start Errorless Test
All Exams Allen Objective Errorless
KCET 2006 Q151 Errorless 8. 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
J & K CET 2006 Q152 Errorless 8. 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
J & K CET 2006; Kerala PMT 2009 Q153 Errorless 10. 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
BHU 2006 Q154 Errorless 10. 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.
$49.8~\mathrm{ms}^{-2}$
UP CPMT 2006 Q155 Errorless 11. Equilibrium of Forces MCQ
An object is kept on a smooth inclined plane of 1 in l. The horizontal acceleration to be imparted to the inclined plane so that the object is stationary relative to the inclined is
A.
$g\sqrt{l^{2}-1}$
B.
$g(l^{2}-1)$
C.
$\frac{g}{\sqrt{l^{2}-1}}$
D.
$\frac{g}{l^{2}-1}$
IIT-JEE 2006; NEET 2017 Q156 Errorless 12. 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
DCE 2006 Q157 Errorless 12. 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 Q158 Errorless 12. 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.
$\frac {m _ {1} m _ {2}}{m _ {1} + m _ {2}}$
D.
$\frac{2m_{1}m_{2}}{m_{1}+m_{2}}$ $m_{2}$
AIIMS 2006 Q159 Errorless 4. 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
AIIMS 2006 Q160 Errorless 13. Graphical Questions MCQ
A person used force (F), shown in figure to move a load with constant velocity on given surface Identify the correct surface profile
A.
B.
C.
D.
AIIMS 2006 Q161 Errorless 5. Assertion and Reason MCQ
Assertion : A man in a closed cabin falling freely does not experience gravity. Reason : Inertial and gravitational mass have equivalence.
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.
MP PMT 2006 Q162 Errorless 1. Static and limiting friction MCQ
A block weighing $W$ is held against a vertical wall by applying a horizontal force $F$ . The minimum value of $F$ needed to hold the block is
A.
Less than $W$
B.
Equal to $W$
C.
Greater than $W$
D.
Data is insufficient
MP PET 2006; JEE (Main) 2018 Q163 Errorless 1. 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 Q164 Errorless 2. 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
IIT-JEE 2006 Q165 Errorless 14. Critical Thinking-Friction MCQ
A circular disc with a groove along its diameter is placed horizontally. A block of mass 1kg is placed as shown. The co-efficient of friction between the block and all surfaces of groove in contact is $\mu=2/5$ . The disc has an acceleration of $25\ m/s^{2}$ . Find the acceleration of the block with respect to disc $\cos \theta = 4 / 5$ $\sin \theta = 3 / 5$
A.
$10 \, m/s^{2}$
B.
$5m / s^2$
C.
20 m/sĀ²
D.
$1m / s^2$
AIIMS 2006 Q166 Errorless 15. Assertion and Reason-Friction MCQ
Assertion : Use of ball bearings between two moving parts of machine is a common practice. Reason : Ball bearings reduce vibrations and provide good stability.
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.
BCECE 2005 Q167 Errorless 8. 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 Q168 Errorless 8. Second Law of Motion MCQ
The adjacent figure is the part of a horizontally stretched net. section AB is stretched with a force of 10 N. The tensions in the sections BC and BF are |E
A.
10N, 11N
B.
10N, 6N
C.
10N, 10N
D.
Can't calculate due to insufficient data
AIEEE 2005; BCECE 2006 Q169 Errorless 8. Second Law of Motion MCQ
A particle of mass 0.3 kg is subjected to a force F = -kx with k = 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin
A.
$5 \, m/s^{2}$
B.
$10 \, m/s^{2}$
C.
$3 \, m/s^{2}$
D.
$15 \, m/s^{2}$
RPMT 2005 Q170 Errorless 8. Second Law of Motion MCQ
The mass of ship is $2 \times 10^{7}$ kg. On applying a force of $25 \times 10^{5}$ N, it is displaced through 25 m. After the displacement, the velocity acquired by the ship will be
A.
12.5 m/s
B.
5 m/s
C.
3.7 m/s
D.
2.5 m/s
RPMT 2005 Q171 Errorless 8. Second Law of Motion MCQ
A sphere is accelerated upwards by a cord whose braking strength is four times its weight. The maximum acceleration with which the sphere can move up without breaking the cord is
A.
$g$
B.
$3g$
C.
$2g$
D.
$4g$
J & K CET 2005 Q172 Errorless 9. 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 Q173 Errorless 9. 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
Kerala PMT 2005 Q174 Errorless 9. Third Law of Motion MCQ
A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book
A.
$0^{\circ}$
B.
$30^{\circ}$
C.
$45^{\circ}$
D.
$180^{\circ}$
Odisha JEE 2005 Q175 Errorless 10. 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