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Power Batch Dropper NEET Target 2026
Physics
WORK,ENERGY & POWER DPP: 1
INTRODUCTION
Q1 An object of mass is released from rest III. All the central forces are non-
from the top of a smooth inclined plane of conservative.
height . Its speed at the bottom of the plane (A) I only (B) I and II
is proportional to (C) II and III (D) I, II and III
(A) (B)
Q7 Match List-I with List-II.
(C) (D)
List-I List-II
Q2 Two balls of equal masses m each undergo A. F (I) m×v
oblique collision. If collision is perfectly elastic, Momentum
then angle between their velocities after B. P (II) after collision
collision is are equal
(A) (B) C. (III)
(C) (D) Momentum
D. (IV) m×a
before collision
Q3 Which of the following is NOT a unit of energy? (A) A-(IV); B-(I); C-(III); D-(II)
(A) Watt (B) eV (B) A-(II); B-(IV); C-(I); D-(III)
(C) Kilowatt hour (D) Joule (C) A-(III); B-(I); C-(IV); D-(I)
(D) A-(I); B-(III); C-(II); D-(IV)
Q4 Unit of work in MKS system is
(A) Calorie (B) Newton Q8 Which of the following is a renewable
(C) Joule (D) Watt resource?
(A) Natural gas (B) Petroleum
Q5 A moving body has kinetic energy twice its
(C) Wind (D) Coal
momentum. The speed of the body is:
(A) 2 m/s (B) m/s Q9 is equal to:-
(C) 4 m/s (D) m/s (A)
(B)
Q6 Choose the correct statement(s) from the (C)
following.
(D)
I. No work is done if the displacement is
perpendicular to the direction of the applied Q10 An ice cube has been given a push and slides
force without friction on a level table. Which is
II. If the angle between the force and correct?
displacement vectors is obtuse, then the work (A) It is in stable equilibrium.
done is negative (B) It is in unstable equilibrium.
(C) It is in neutral equilibrium.
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(D) It is not in equilibrium.
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Answer Key
Q1 A Q6 D
Q2 D Q7 A
Q3 A Q8 C
Q4 C Q9 C
Q5 C Q10 C
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Hints & Solutions
Note: scan the QR code to watch video solution
Q1 Text Solution:
Using energy conservation, ,
we get , independent of .
Q6 Text Solution:
Video Solution: (D)
A conservative force is that force which is
independant of path followed e.g. gravitational
force, electrostatic force, etc. All of these are
central forces. So, all the central forces are
conservative.
Q7 Text Solution:
Q2 Video Solution:
(1)
Conceptual question
Q8 Text Solution:
A renewable energy source means energy that
is sustainable - something that can't run out,
or is endless, like the sun. Coal, Petroleum and
Q3 Text Solution: Natural gas are forms of fossil fuels. fossil
(1) fuels are non- renewable sources of energy
Watt is the SI unit of power whereas, wind is a renewable source of
eV is small unit of energy which is defined as energy.
Q9 Text Solution:
kilowatt-hour is unit of energy which is equal
to Thus, option (C) is correct.
Joule is the SI unit of energy Q10 Text Solution:
Calorie is a unit of energy which is defined as 1. The ice cube is in neutral equilibrium.
2. Its zero acceleration is evidence for
Q4 Text Solution: equilibrium.
In the MKS system, work is measured in joules 3. When a disturbing force is applied to an
(J). object in neutral equilibrium, the centre of
gravity remains at the same height and the
Q5 Text Solution:
object does not move when the disturbing
force is removed.
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