Previous IIT-JEE Physics Questions & Answers
Advanced Set–2 : Complete Mechanics (Mixed Concepts)
This set represents high-difficulty questions asked in IIT-JEE / JEE Advanced, testing multi-concept understanding and system-level thinking.
Laws of Motion
Q21.
A particle moves with constant speed in a circle. What can be said about the net force?
Answer: Non-zero and directed towards the centre.
Q22.
A body is projected vertically upward. At the highest point, which quantity is zero?
Answer: Velocity
Work, Energy and Power
Q23.
A force varies with displacement as F = kx. Find the work done from x = 0 to x = a.
Answer: (1/2)ka²
Q24.
A body slides on a rough horizontal surface. Which quantity decreases continuously?
Answer: Mechanical energy
Centre of Mass & Collisions
Q25.
Two particles move in opposite directions with equal momenta. Find velocity of centre of mass.
Answer: Zero
Q26.
In a perfectly inelastic collision, what happens to kinetic energy?
Answer: Maximum loss occurs
Rotational Mechanics
Q27.
On what factor does moment of inertia depend?
Answer: Distribution of mass about axis
Q28.
For rolling without slipping on a rough surface, what provides the torque?
Answer: Friction
Gravitation
Q29.
At what height above Earth’s surface does g become half of its surface value?
Answer: h = R
Q30.
If total energy of a satellite is negative, what does it indicate?
Answer: Satellite is in a bound orbit
Oscillations & SHM
Q31.
At which point in SHM is kinetic energy maximum?
Answer: Mean position
Q32.
What happens to the time period of a simple pendulum if amplitude increases slightly?
Answer: Remains approximately same
Mechanical Waves
Q33.
What happens to wavelength when a wave enters a denser medium?
Answer: Decreases
Q34.
In a standing wave, which points never vibrate?
Answer: Nodes
Mixed High-Level IIT Problems
Q35.
A satellite moving in a circular orbit suddenly loses some energy. What happens to its angular speed?
Answer: Increases
Q36.
A particle executes SHM. Which quantity remains constant throughout the motion?
Answer: Total mechanical energy
Q37.
Two waves of equal frequency and amplitude interfere. What determines the nature of interference?
Answer: Phase difference
Q38.
In absence of external torque, which quantity is conserved?
Answer: Angular momentum
Q39.
In collision problems, why is centre of mass frame useful?
Answer: Total momentum becomes zero
Q40.
In wave motion, which quantity depends on amplitude?
Answer: Energy
✔ End of Advanced IIT-JEE PYQs – Set–2 (Complete Mechanics)
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