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Yekeen NEET 2.0 (2026)
Physics by Saleem Sir
KPP - 23 Newton’s Laws of Motion
Time Limit 01 Hour
1. Two blocks are connected by a string as shown in the 3. In the figure shown acceleration of monkey relative
diagram. The upper block is hung by another string. to the rope if it exerts a force of 80 N on string will
A force F applied on the upper string produces an be:
2
acceleration of 2 m/s in the upward direction in both
the blocks. If T and T' be the tensions in the two parts
of the string, then.
(1) 2 m/s2 downwards
(2) 4 m/s2 upwards
(1) T = 70.8 N and T′= 47.2 N (3) 4 m/s2 downwards
(2) T = 58.8 N and T′= 47.2 N (4) 8 m/s2 downwards
(3) T = 70.8 N and T′ = 58.8 N
(4) T = 70.8 N and T′ = 0
4. In the figure, the blocks A, B and C of mass m each
have acceleration a1, a2 and a3 respectively. F1 and F2
2. A monkey of mass 40 kg climbs on a rope which can
are external forces of magnitudes 2 mg and mg
withstand a maximum tension of 600 N. In which of
respectively.
the following cases will the rope break the monkey.
(1) Climbs up with an acceleration of 6 ms–2 (1) a1 = a2 = a3
–2
(2) Climbs down with an acceleration of 4 ms (2) a1 > a2 > a3
–1
(3) Climbs up with an uniform speed of 5 ms (3) a1 = a2, a2 > a3
(4) Falls down the rope nearly freely under gravity (4) a1 > a2, a2 = a3
2
5. A uniform rope of length L and mass M is placed on 8. Ιn the system shown in the figure, the acceleration of
a smooth fixed wedge as shown. Both ends of rope the 1 kg mass and the tension in the string connecting
are at same horizontal level. The rope is initially between A and B is:
released from rest, then the magnitude of initial
acceleration of rope is:
(1) Zero
(2) M(cosα – cos β) g
(3) M(tan α – tan β)g
(4) None of these
g 8g
6. A balloon of gross weight w newton is falling (1) downwards,
vertically downward with a constant acceleration 4 7
a(<g). The magnitude of the air resistance is: g g
(Neglecting buoyant force). (2) upwards,
4 7
a g 6
(1) w (2) w 1 + (3) downwards, g
g 7 7
a a g
(3) w 1 − (4) w (4) upwards, g
g g 2
7. Which figure represents the correct F.B.D. of rod of 9. A constant force F is applied in horizontal direction
mass m as shown in figure: as shown. Contact force between M and m is N and
between m and M' is N' then
(1) N = N'
(2) N > N'
(3) N' > N
(1) (4) Cannot be determined
10. A body of mass 5 kg is suspended by the strings
making angles 60º and 30º with the horizontal
(A) T1 = 25 N
(B) T2 = 25 N
(2)
(C) T1 = 25 3 N
(D) T2 = 25 3 N
(3)
(1) A, B (2) A, D
(3) C, D (4) B, C
(4) None of these
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11. The 50 kg homogeneous smooth sphere rests on the 14. Two blocks, each having mass M, rest on frictionless
30° incline A and bears against the smooth vertical surfaces as shown in the figure. If the pulleys are light
wall B. Calculate the contact forces at A and B. and frictionless, and M on the incline is allowed to
move down, then the tension in the string will be:
1000 500
(1) NB = N, NA = N
3 3
1000 500 2 3
(2) NA = N, NB = N (1) Mg sin (2) Mg sin
3 3 3 2
100 500 Mg sin
(3) NA = N, NB = N (3) (4) 2 Mg sin θ
3 3 2
1000 50
(4) NA = N, NB = N 15. In the figure a smooth pulley of negligible weight is
3 3
suspended by a spring balance. Weights of 1 kg and
12. Find out the reading of the weighing machine in the 5 kg are attached to the opposite ends of a string
following cases. passing over the pulley and move with acceleration
because of gravity. During the motion, the spring
balance reads a weight of
(1) 10 3 (2) 10 2
(3) 20 3 (4) 30 3
13. The pulley arrangements shown in figure are
identical, the mass of the rope being negligible. In
case-I, the mass m is lifted by attaching a mass 2m to
the other end of the rope. In case-II, the mass m is (1) 6 kg
lifted by pulling the other end of the rope with a (2) Less than 6 kg
constant downward force F = 2mg, where g is (3) More than 6 kg
acceleration due to gravity. The acceleration of mass (4) May be more or less than 6 kg
in case-I is:
16. In the figure at the free end a force F is applied to keep
the suspended mass of 18 kg at rest. The value of F is:
(1) Zero
(2) More than that in case-II
(3) Less than that in case-II
(4) Equal to that in case-II (1) 180 N (2) 90 N
(3) 60 N (4) 30 N
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17. A cricket player catches a ball of mass 120 g moving 21. A block of √3 kg is attached to a string whose other
with 25 m/s speed. If the catching process is
end is attached to the wall. An unknown force F is
completed in 0.1 s then the magnitude of force
exerted by the ball on the hand of player will be applied so that the string makes an angle of 30° with
(in SI unit): [Feb 1, 2024 (II)]
(1) 30 (2) 24 the wall. The tension T is:
(3) 12 (4) 25 (Given g = 10 ms–2)
[Jan 30, 2023 (II)]
18. A body of mass 4 kg experiences two forces
F1 = 5iˆ + 8 ˆj + 7kˆ and F2 = 3iˆ − 4 ˆj − 3kˆ .
The acceleration acting on the body is:
[01 Feb, 2024 (Shift-II)]
(1) −2iˆ − ˆj − kˆ
(2) 4iˆ + 2 ˆj + 2kˆ 3
(3) 2iˆ + ˆj + kˆ (1) 20 N (2) 25 N
(4) 2iˆ + 3 ˆj + 3kˆ (3) 10 N (4) 15 N
19. A wooden block, initially at rest on the ground, is 22. A 1 kg mass is suspended from the ceiling by a rope
pushed by a force which increases linearly with time of length 4m. A horizontal force 'F' is applied at the
t. Which of the following curve best describes
acceleration of the block with time: mid point of the rope so that the rope makes an angle
[April 4, 2024 (I)]
of 45° with respect to the vertical axis as shown in
figure. The magnitude of F is:
(1) (2) [April 9, 2024 (II)]
(3) (4)
20. A particle moves in 𝑥 − 𝑦 plane under the influence
of a force 𝐹⃗ such that its linear momentum is 𝑝⃗(𝑡) = 10
(1) N
𝑖̂cos(𝑘𝑡) − 𝑗̂sin(𝑘𝑡) . If k is constant, the angle 2
between 𝐹⃗ and 𝑝⃗ will be: (2) 1 N
[April 5, 2024 (II)]
(1) /2 (2) /6 1
(3) N
(3) /4 (4) /3 10 2
(4) 10 N
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23. Two bodies of masses m1 = 5 kg and m2 = 3 kg are 27. As per given figure, a weightless pulley P is attached
connected by a light string going over a smooth light on a double inclined frictionless surface. The tension
pulley on a smooth inclined plane as shown in the in the string (massless) will be
2
figure. The system is at rest. The force exerted by the (if g = 10 m/s ). [Jan 24, 2023 (I)]
inclined plane of the body of mass m1 will be:
[Take g = 10 ms–2]
[July 29, 2022 (II)]
(1) (4 )
3 +1 N (2) 4 ( )
3 +1 N
(3) 4( 3 − 1) N (4) ( 4 3 − 1) N
(1) 30 N (2) 40 N
(3) 50 N (4) 60 N 28. A block of mass M is pulled by a uniform chain of
mass M tied to it by applying a force F at the other
24. A person standing on a balance inside a stationary lift end of the chain. The tension at a point distant quarter
measures 60 kg. The weight of that person if the lift of the length of the chain from free end will be:
descends with uniform downward acceleration of
1.8 m/s2 will be ________ N. [g = 10 m/s2]
[26 Feb, 2021 (Shift-I)]
7F 4F
(1) (2)
25. Three blocks A, B and C are pulled on a horizontal 8 5
smooth surface by a force of 80 N as shown in figure 3F 6F
(3) (4)
4 7
The tensions T1 and T2 in the string are respectively 29. A painter is raising himself and the crate on which he
[Jan 30, 2024 (II)]
(1) 40 N, 64 N (2) 60 N, 80 N stand with an acceleration of 5 m/s2 by a massless
(3) 88 N, 96 N (4) 80 N, 100 N rope and pulley arrangement. Mass of the painter is
100 kg and that of the crate is 50 kg. If g = 10 m/s2,
then the
26. A light string passing over a smooth light fixed pulley
connects two blocks of masses m1 and m2. If the
acceleration of the system is g/8, then the ratio of
masses is:
[31 Jan, 2024 (Shift-II)]
(i) tension in rope is 2250 N
(ii) tension in rope is 1125 N
(iii) force of contact between the painter and the floor
is 750 N
(iv) force of contact between the painter and the floor
is 375 N
(1) (i), (ii) (2) (ii), (iv)
(1) 9/7 (2) 8/1 (3) (i), (iv) (4) (ii), (iii)
(3) 4/3 (4) 5/3
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30. In the arrangement shown, the pulleys are fixed and 31. Two blocks A and B of equal mass m are connected
ideal, the strings are light, m1 > m2 and S is a spring through a massless string and arranged as shown in
figure. Friction is absent everywhere. When the
balance which is itself massless. The reading of S (in system is released from rest.
units of mass) is:
mg
(1) Tension in string is
2
mg
(2) Tension in string is
1 4
(1) m1 – m2 (2) (m1 + m2 ) g
2 (3) Acceleration of A is
2
m1m2 2m1m2
(3) (4) 3
m1 + m2 m1 + m2 (4) Acceleration of A is g
4
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Answer Key
1. (1) 17. (1)
2. (1) 18. (3)
3. (2) 19. (2)
4. (2) 20. (1)
5. (1) 21. (1)
6. (3) 22. (4)
7. (1) 23. (2)
8. (3) 24. (492)
9. (2) 25. (1)
10. (2) 26. (1)
11. (2) 27. (2)
12. (1) 28. (1)
13. (3) 29. (2)
14. (3) 30. (4)
15. (2) 31. (2, 4)
16. (2)
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