📚 FYUG (NEP) previous year question papers solution
ASSAM UNIVERSITY, SILCHAR
FYUG 1st semester Physics DSC 102 Previous Year Question Papers Solutions
UNIT 1
Work and Energy: Work - Energy Theorem. Conservative and non-conservative forces. Elastic potential energy. Force as gradient of potential energy. Law of conservation of mechanical Energy.
Collisions: Elastic and inelastic collisions in one and two dimensions. Collisions in Centre of Mass and Laboratory frames.
2019
(FYUG PHY-DSC102 Same as CBCS PHҮНСС–102T )
1. Differentiate between inertial and non-inertial frames.
2. Show that Newton's second law of motion is invariant under Galilean transformation.
3. What are meant by laboratory and centre of mass frames of references?
4. Establish the following relation for rocket motion
v = v0 + u loge
M0
M
where v0 is the initial velocity, u is the exhaust velocity of gases relative to rocket and M0 is the initial mass.
5. Prove that
J
=
JCM
+
R × P
where
J
= angular momentum in lab frame
JCM
= angular momentum in centre of mass frame
P
= linear momentum of the system
R
= position vector of the centre of mass
6. Neglecting the attraction of the earth, show that
v = v0
− u loge
(
1 −
mt
M0
)
where v0 is the initial velocity, v is the velocity acquired in t sec, u is the exhaust velocity and m is the constant rate of burning of the fuel of a rocket.
7. Show that in absence of any external force, the velocity of centre of mass of a system remains constant.
2020
(FYUG PHY-DSC102 Same as CBCS PHҮНСС–102T )
8.What do you mean by reference frame?
9. Show that the path of a projectile as seen from another projectile will always be a straight line.
10. Explain the principle of conservation of momentum.
11. Define conservative and non-conservative forces.
12. Show that force as gradient of potential energy.
13. Explain the terms from a potential energy curve, stable and unstable equilibrium
14. Show that the laws of conservation of momentum and energy are invariant under Galilean transformation.
15. Calculate the position, velocity and acceleration of centre of mass of two particles.
2021
(FYUG PHY-DSC102 Same as CBCS PHҮНСС–102T )
16. Define stable and unstable equilibrium.
17. What are conservative and non-conservative forces?
18. Write two differences between elastic and in-elastic collision.
19. Show that the trajectory of a projectile fired at an angle with the horizontal direction is parabolic in nature. Find an expression for the horizontal range.
20. State and prove work-energy theorem.
21. Show that force can be expressed as the negative gradient of the potential.
2023
(FYUG PHY-DSC102 )
22. State with examples the principle of conservation of linear momentum.
23. What are conservative and non-conservative forces? Give examples.
24. explain why a cricket player lowers his hands while catching a cricket ball
25. Define centre of mass of a system. Calculate the position, velocity and acceleration of centre of mass of two particles
26. State work-energy theorem with examples. Show that force is gradient of potential energy.
27. Explain what is meant by elastic potential energy of a spring. Obtain an expression for it and discuss the nature of its variation
28. Define coefficient of restitution. Show that in an elastic one-dimensional collision, when a body collides with another body of same mass at rest, they just interchange their velocities after collision.
2024
(FYUG PHY-DSC102 )
29. Define linear momentum of a moving particle. How is it related to force?
30. Three particles of masses 2 gm, 3 gm and 5 gm are located in space.
Their position vectors are
r1
=
2i
+
2j
+
2k,
r2
=
i
+
j
+
k
and
r3
=
i
−
k
respectively. Find the position vector of the centre of mass.
31. Distinguish between elastic collision and inelastic collision.
32. What do you mean by projectile? Show that the trajectory of a projectile fired at an angle with the horizontal direction is parabolic in nature.
33. Find expressions for the
(i) Time of flight
(ii) Horizontal range
OR
34. Define conservative force. Show that the central force is conservative in nature. Obtain the law of conservation of mechanical energy.
35. State and prove work-energy theorem.
CBCS PYQ SAME AS FYUG PHYSICS DSC 102
| CBCS PHYHCC-102 Question Paper 2019 | Click Here |
| CBCS PHYHCC-102 Question Paper 2020 | Click Here |
| CBCS PHSHCC-102 Question Paper 2021 | Click Here |
FYUG PYQ PHYSICS DSC 102
| FYUG PHYSICS DSC 102 Question Paper 2023 | Click Here |
| FYUG PHYSICS DSC 102 Question Paper 2024 | Click Here |
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