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629 Questions Start Allen Test
All Exams Allen Objective Errorless
UPSEAT 2003 Q251 Errorless Second Law of Motion MCQ
If in a stationary lift, a man is standing with a bucket full of water, having a hole at its bottom. The rate of flow of water through this hole is $R_{0}$ . If the lift starts to move up and down with same acceleration and then that rates of flow of water are $R_{u}$ and $R_{d}$ , then
A.
$R_{0} > R_{u} > R_{d}$
B.
$R_{u} > R_{0} > R_{d}$
C.
$R_{d} > R_{0} > R_{u}$
D.
$R_{u} > R_{d} > R_{0}$
AIEEE 2003; RPET 2003; Kerala PMT 2003; RPMT 2005 Q252 Errorless Second Law of Motion MCQ
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of $5 \, m/s^{2}$ , the reading of the spring balance will be
A.
49 N
B.
24 N
C.
74 N
D.
15 N
AIEEE 2003 Q253 Errorless Third Law of Motion MCQ
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
A.
Both the scales read $M / 2 \, \text{kg}$ each
B.
Both the scales read $M \, \text{kg}$ each
C.
The scale of the lower one reads $M \, \text{kg}$ and of the upper one zero
D.
The reading of the two scales can be anything but the sum of the reading will be $M \, \text{kg}$
AIEEE 2003 Q254 Errorless Conservation of Linear Momentum and Impulse MCQ
A rocket with a lift-off mass $3.5 \times 10^{4}$ kg is blasted upwards with an initial acceleration of $10 \, m/s^{2}$ . Then the initial thrust of the blast is
A.
$1.75 \times 10^{5} \, N$
B.
$3.5 \times 10^{5} \, N$
C.
$7.0 \times 10^{5} \, N$
D.
$14.0 \times 10^{5} \, N$
Odisha JEE 2003 Q255 Errorless Equilibrium of Forces MCQ
Which of the four arrangements in the figure correctly shows the vector addition of two forces $\overrightarrow{F_{1}}$ and $\overrightarrow{F_{2}}$ to yield the third force $\overrightarrow{F_{3}}$
A.
B.
C.
D.
AIEEE 2003 Q256 Errorless Equilibrium of Forces MCQ
Three forces starts acting 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). The particle will now move with velocity
A.
$\vec{v}$ remaining unchanged
B.
Less than $\vec{v}$
C.
Greater than $\vec{v}$
D.
$\vec{v}$ in the direction of the largest force $BC$
KCET 2003; UPSEAT 2004 Q257 Errorless Equilibrium of Forces MCQ
Which of the following groups of forces could be in equilibrium
A.
3 N, 4 N, 5 N
B.
4 N, 5 N, 10 N
C.
30 N, 40 N, 80 N
D.
1 N, 3 N, 5 N
AIEEE 2003; Odisha JFE 2003; WB-JEE 2010 Q258 Errorless Static and limiting friction MCQ
A boy of mass 40 kg is climbing a vertical pole at a constant speed. If the coefficient of friction between his palms and the pole is 0.8 and $g = 10m/s^{2}$ , the horizontal force that he is applying on the pole is
A.
300 N
B.
400 N
C.
500 N
D.
600 N
MP PMT 2003 Q259 Errorless Static and limiting friction MCQ
A block of 1 kg is stopped against a wall by applying a force F perpendicular to the wall. If $\mu = 0.2$ then minimum value of F will be
A.
980 N
B.
49 N
C.
98 N
D.
490 N
BVP 2003; IIT-JEE 2008 Q260 Errorless Kinetic Friction MCQ
It is easier to roll a barrel than pull it along the road. This statement is
A.
False
B.
True
C.
Uncertain
D.
Not possible
AIEEE 2003 Q261 Errorless Kinetic Friction MCQ
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10s. Then the coefficient of friction is
A.
0.01
B.
0.02
C.
0.03
D.
0.06
UPSEAT 2003 Q262 Errorless Motion on Inclined Surface MCQ
A 2 kg mass starts from rest on an inclined smooth surface with inclination $30^{\circ}$ and length 2 m. How much will it travel before coming to rest on a frictional surface with frictional coefficient of 0.25
A.
4 m
B.
6 m
C.
8 m
D.
2 m
IIT-JEE (Screening) 2003 Q263 Errorless Critical Thinking-Friction MCQ
What is the maximum value of the force $F$ such that the block shown in the arrangement, does not move
A.
$20N$
B.
$10N$
C.
$12N$
D.
$15N$
AIEEE 2002 Q264 Errorless Second Law of Motion MCQ
A lift is moving down with acceleration $a$ . A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively
A.
$g, g$
B.
$g - a, g - a$
C.
$g - a, g$
D.
$a, g$
Pb. PET 2002 Q265 Errorless Second Law of Motion MCQ
The linear momentum p of a body moving in one dimension varies with time according to the equation $p = a + bt^{2}$ where a and b are positive constants. The net force acting on the body is
A.
A constant
B.
Proportional to $t^{2}$
C.
Inversely proportional to t
D.
Proportional to t
AFMC 2002; MP PET 2002 Q266 Errorless Second Law of Motion MCQ
A force of 10 Newton acts on a body of mass $20\mathrm{kg}$ for 10 seconds. Change in its momentum is
A.
$5\mathrm{kg}m / s$
B.
$100\mathrm{kg}m / s$
C.
$200\mathrm{kg}m / s$
D.
$1000\mathrm{kg}m / s$
Pb. PMT 2002 Q267 Errorless Second Law of Motion MCQ
A block of mass 5kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force of 5N acts on it for 4 sec. What will be the distance of the block from the point where the force started acting
A.
10 m
B.
8 m
C.
6 m
D.
2 m
KCET 2002 Q268 Errorless Equilibrium of Forces MCQ
The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two forces. The angle between the two forces is
A.
$60^{\circ}$
B.
$120^{\circ}$
C.
$150^{\circ}$
D.
$90^{\circ}$
AIEEE 2002 Q269 Errorless Equilibrium of Forces MCQ
Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the smaller force and magnitude of resultant is 12 N. Then the magnitudes of the forces are
A.
12 N, 6 N
B.
13 N, 5 N
C.
10 N, 8 N
D.
16 N, 2 N
AIEEE 2002 Q270 Errorless Equilibrium of Forces MCQ
Which of the following is the correct order of forces
A.
Weak < gravitational forces < strong forces (nuclear) < electrostatic
B.
Gravitational $ < $ weak $ < $ (electrostatic) $ < $ strong force
C.
Gravitational $ < $ electrostatic $ < $ weak $ < $ strong force
D.
Weak < gravitational < electrostatic < strong forces
Odisha JEE 2002 Q271 Errorless Motion of Connected Bodies MCQ
Three blocks of masses 2 kg, 3 kg and 5 kg are connected to each other with light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force F = 10N, then tension $T_{1} =$
A.
$1N$
B.
$5N$
C.
8N
D.
$10N$
Kerala PMT 2002 Q272 Errorless Motion of Connected Bodies MCQ
A body of weight 2kg is suspended as shown in the figure. The tension $T_{1}$ in the horizontal string (in kg wt) is
A.
$2 / \sqrt{3}$
B.
$\sqrt{3} / 2$
C.
$2\sqrt{3}$
D.
2
AIEEE 2002 Q273 Errorless Motion of Connected Bodies MCQ
One end of a massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. with what value of minimum safe acceleration (in $ms^{-2}$ ) can a monkey of 60 kg move down on the rope
A.
16
B.
6
C.
4
D.
8
AIEEE 2002 Q274 Errorless Motion of Connected Bodies MCQ
A light string passing over a smooth light pulley connects two blocks of masses $m_1$ and $m_2$ (vertically). If the acceleration of the system is $g/8$ then the ratio of the masses is
A.
8:1
B.
9:7
C.
4:3
D.
5:3
UPSEAT 2002 Q275 Errorless Critical Thinking MCQ
A pulley fixed to the ceiling carries a string with blocks of mass $m$ and $3m$ attached to its ends. The masses of string and pulley are negligible. When the system is released, its centre of mass moves with what acceleration
A.
0
B.
$g / 4$
C.
$g / 2$
D.
$-g / 2$