A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 ms–2) 

(1) 100 ms–2

(2) 3 ms–2

(3) 10 ms–2

(4) 30 ms–2

Subtopic:  String Constraint |
 85%
From NCERT
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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 = 10 N, then tension T1 = 

(1) 1N

(2) 5 N

(3) 8 N

(4) 10 N

Subtopic:  Application of Laws |
 86%
From NCERT
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A body of weight 2kg is suspended as shown in the figure. The tension T1 in the horizontal string (in kg wt) is 

(1) 2/3

(2) 3/2

(3) 23

(4) 2

Subtopic:  Application of Laws |
 72%
From NCERT
PMT - 2002
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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 

(1) 16

(2) 6

(3) 4

(4) 8

Subtopic:  Application of Laws |
 77%
From NCERT
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A light string passing over a smooth light pulley connects two blocks of masses m1 and m2 (vertically). If the acceleration of the system is g/8 then the ratio of the masses is 

(1) 8 : 1

(2) 9 : 7

(3) 4 : 3

(4) 5 : 3

Subtopic:  Application of Laws |
 81%
From NCERT
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A block of mass 4 kg is suspended through two light spring balances A and B. Then A and B will read respectively 

(1) 4 kg and zero kg

(2) Zero kg and 4 kg

(3) 4 kg and 4 kg

(4) 2 kg and 2 kg

Subtopic:  Spring Force |
 73%
From NCERT
AIIMS - 1995
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Two masses M and M/2 are joint together by means of a light inextensible string passes over a frictionless pulley as shown in figure. When bigger mass is released the small one will ascend with an acceleration of 

(1) g/3

(2) 3g/2

(3) g/2

(4) g

Subtopic:  Application of Laws |
 80%
From NCERT
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Two masses m1 and m2 (m1 > m2) are connected by massless flexible and inextensible string passed over massless and frictionless pulley. The acceleration of centre of mass is 

(1) m1m2m1+m22g

(2) m1m2m1+m2g

(3) m1+m2m1m2g

(4) Zero

Subtopic:  Application of Laws |
From NCERT
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The mass of a body measured by a physical balance in a lift at rest is found to be m. If the lift is going up with an acceleration a, its mass will be measured as:

(1) m1ag

(2) m1+ag

(3) m

(4) Zero

Subtopic:  Pseudo Force |
From NCERT
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Three weights W, 2W and 3W are connected to identical springs suspended from a rigid horizontal rod. The assembly of the rod and the weights fall freely. The positions of the weights from the rod are such that 

(1) 3W will be farthest

(2) W will be farthest

(3) All will be at the same distance

(4) 2W will be farthest

Subtopic:  Spring Force |
 65%
From NCERT
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