An open knife edge of mass m is dropped from a height on a wooden floor. If the blade penetrates distance into the wood, the average resistance offered by the wood to the blade is
1
2
3
4
Official Solution
Correct Option:
(2)
Velocity at the time when knife edge strikes wooden floor is . The velocity of is reduced to zero in a distance . If is the average retardation, then by work-energy theorem, we have
02
PYQ 2009
medium
physicsID: amueee-2
Two springs and are identical but is harder than . Let and represent the work done when the springs are stretched through the same distance and and are the work done when these are stretched by equal forces, then which of the following is true?
1
and
2
and
3
and
4
and
Official Solution
Correct Option:
(2)
Work done in stretching a spring Here, and As and
Similarly, when forces are equal
(i) As (ii) Now, and From Eqs. (i) and (ii), we conclude that
03
PYQ 2011
medium
physicsID: amueee-2
A particle of mass moving with speed towards east strikes another particle of same mass moving with same speed towards north. After striking, the two particles fuse together. With what speed this new particle of mass will move in north-east direction?
1
2
3
4
Official Solution
Correct Option:
(4)
From conservation of linear momentum
04
PYQ 2012
easy
physicsID: amueee-2
A particle in a certain conservative force field has a potential energy given by . The force exerted on it is
Official Solution
Correct Option:
(1)
05
PYQ 2012
easy
physicsID: amueee-2
A sphere of mass m and velocity - undergoes an oblique and perfectly elastic collision with an identical sphere initially at rest. The angle between the velocities of the spheres after the collision shall be
Official Solution
Correct Option:
(1)
06
PYQ 2013
medium
physicsID: amueee-2
Figure gives the acceleration of a body as it moves from rest along axis while a variable force acts on it from to . The work done by the force on the body when it reaches (i) and (ii) shall be as given below
1
21 J and 33 J respectively
2
21 J and 15 J respectively
3
42 J and 60 J respectively
4
42 J and 30 J respectively
Official Solution
Correct Option:
(4)
From figure Work done
07
PYQ 2018
medium
physicsID: amueee-2
The only force acting on a body that is moving in plane has a magnitude of . The body initially has a velocity of in the positive -direction. Some time later, the body has a velocity of in the positive direction. The work done on the body by the force during this time is
1
20 J
2
40 J
3
50 J
4
72 J
Official Solution
Correct Option:
(1)
The correct answer is A : Given, , and According to work-energy theorem,
[putting values]
08
PYQ 2018
medium
physicsID: amueee-2
The graphs below show the magnitude of the force on a particle as it moves along the positive -axis from the origin to . The force is parallel to the -axis and conservative. The maximum magnitude has the same value for all graphs. Rank the situations according to the change in the potential energy associated with the force, least (or most negative) to greatest (or most positive).
1
(i), (ii), (iii)
2
(i) (iii), (ii),
3
(iii), (ii), (i)
4
(ii), (i), (iii)
Official Solution
Correct Option:
(4)
As we know, for a conservative force field
where, = change in potential energy, = conservative force (or ) and = change in position of the particle or =-work done by (or For graph , For graph , and for graph , Thus, change in potential energy For graph , graph graph, Thus, we have, $\Delta U_{2} < \, \Delta U_{1}
About Work Energy And Power - AMUEEE
Work Energy And Power is a vital chapter for AMUEEE aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Work Energy And Power PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Work Energy And Power carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
