MORE THAN ONE OPTION CORRECT TYPE
- e particles A and B each of
mass ‘m’ are attached by a light
inextensible string of length 2 l.
The whole system lies on a
smooth horizontal table with B
initially at a distance l from A. B is given velocity ‘u’
as shown in gure. en just a er the jerk
(a) v
u
A=
3
4
(b) v
u
B=
3
4
(c) component of vB along AB is u^3
4
(d) component of vB perpendicular to AB =
u
2
- e uniform speed of a body is the same as seen
from any point in the body. A light cord is wrapped
around the rim of the disc of mass 2 kg and mass of
1 kg is tied to the free end. If it is released from rest,
(a) the tension in the cord is 5 N
(b) in the rst 4 s the angular displacement of the
disc is 40 rad
(c) the work done by the torque on the disc in the
rst 4 s is 200 J
(d) the increase in kinetic energy of the disc in the
rst 4 s is 200 J.
NUMERICAL VALUE TYPE
- Consider surfaces as
frictionless for the
diagram drawn if velocity
of block A is 2 m s–1
downward. Velocity of
ring is n×^2 −
3
m s^1
towards le . Find n.
[String is ideal]
- A projectile projected
tangentially from the surface
of a planet of radius R from a
point A, follows the indicated
trajection during its motion.
If it is at a height of 3R at
the farthest point of its
trajectory, then the velocity of
projection at A, v 0 is given by NgR. Find value
of N.
A
B
u
l
Rod Ring
53°
2 m s–1
A
v 0
A
CROSSWORD SOLUTION SEPTEMBER 2018
Solution Senders
- Divyansh Srivastava, Jhansi (U.P.)
- Suraj Kumar, Nalanda
- Brajadulal Jana, Midnapore (W.B)
- Amartyaraj, Patna (Bihar)
- Abhivyakti Sinha,
Moradabad (U.P)
- Dwija Poddar, Kolkata (W.B)
- Shayak Karan, Medinipur,
Panskura
- Abhisek Maiti, Medinipur,
Panskura
- Ankush Maity (W.B)
- Santanu Singh, Kolaghat,
Purba Medinipur
- Aaditya Ojha, Bhaktinagar
Pandeypur Varanasi, (U.P)
- Aayush Kumar, Kota
(Rajasthan)
- Saptashwa Bag, Hooghly (W.B)
- Jinjiri Bora, Guwahati (Assam)
- Soumyajit Maity,
East Midnapora (W.B)
16. S. Navya Deepika,
Anantapur (A.P)
17. Arpita Ghosh, Kolkata (W.B)
18. Rupanav Arandhara,
RJC (Assam)
19. Nitesh Kumar Sahoo,
Cuttack (Odisha)
20. Devjit Acharjee, Kolkata (W.B)
21. T.K.S.S Ashok, Kakinada (A.P)
22. Kripalinee Devi,
Bhubaneswar (Odisha)
23. M Kavya, Hyderabad
24. Srijan, Panaskura, (W.B)
25. Chandan Mondal,
Durgapur (W.B)
26. Sudipta Pal
27. G.Lakshmi Prasanna,
Hyderabad (T.S)
28. Titas Pal, Kolaghat,
Purba Medinipur (W.B)
29. Anusha Biswas, Nadia (W.B)
Solution Senders of Physics Musing
SET- 62
- Kunal Mukherjee (W.B.)
- Shukriti Roy (Bangalore)
- Devashish Yary, Patna (Bihar)
