The JEE Main 2022 is a preliminary level of the Joint Entrance Examination taken by thousands of students each year. The competition is fierce because the exam is a route to the country’s most famous engineering universities.
The JEE Main 2022 is among the most coveted exams in India. The NTA (National Testing Agency) administers JEE Main 2022 examinations to measure students’ aptitude for continuing engineering courses in some of India’s leading technical universities across the nation. Intelligent planning and devotion are essential to pass an exam like the JEE 2022. The JEE Main 2022 exam covers three subjects: Physics, Mathematics and Chemistry. Most students preparing for JEE examinations find Physics the most difficult. Numerous students struggle to achieve excellent grades in Physics. Students can check the complete JEE Main 2022 Physics Syllabus here.
Here is the collection of some of the key questions from the Mechanics unit to assist students in grasping the JEE 2022 Physics questions easily. Students must check these important Mechanics questions with solutions for Physics to attain the top rank in the JEE 2022 examination.
JEE Main 2022 Physics
The Physics section of the JEE Main 2022 examination consists of 30 questions carrying 4 points each. The Physics section has further classified its questions into MCQs (20 questions) and numerical-based questions (10 questions). In the second set, numerical-based questions, students need to only attempt 5 questions from the 10 questions.
The JEE Main 2022 Physics has an extensive syllabus encompassing topics from Classes 11 and 12. The JEE Main 2022 does not follow a clear examination pattern in its questions and can be framed in multiple ways. Thus students must be well-prepared with the topics. However, a firm grasp of Mechanics’ important questions can make the preparation process much easier for students.
Watch: JEE Main 2022 July Attempt: Solving Most Important JEE Physics Questions
JEE Main 2022 Physics: Mechanics Important Questions with Solutions
1. A river flows at a rate of 5 m / min from west to east. A man on the river’s south bank, competent at swimming at 10 m / min in calm water, wants to swim throughout the river in the shortest time. In which specific direction should the man swim to reach his destination.
- a) due north
- b) 30° west of north
- c) 30° east of north
- d) 60° east of north
Ans. Time to cross river = t
t = d / vs cos θ
For time t to be minimum, cos should be at its maximum.
∴ θ should be 0.
Hence, the swimmer should swim due north. The correct answer is option A.
Q. In a circular orbit around the Earth, a satellite moves at a constant speed of ‘V.’ An object of mass ‘m’ is launched from the satellite, just escaping the Earth’s gravitational attraction. The kinetic energy of the body is released at the time of ejection.
a) 1/2 mV2
c) 3/2 mV2
d) 2 mV2
2. A substance travels from place A to place B in 1.0 seconds, travelling in a semicircle of radius 1.0 m, as indicated in the figure. The average velocity has the following magnitude:
- a) 3.14 m/sec
- b) 1.0 m/sec
- c) 2.0 m/sec
- d) zero
Ans. Average velocity = displacement / time
= 2r / t
= 2 x 1 / 1
= 2 m/sec
Therefore the correct answer is option c.
3. A 0.2-kilogramme ball is suspended from a 5 m vertical. A bullet with a mass of 0.01 kg and a horizontal velocity of V m/s collides with the centre of the ball. Following the contact, the bullet and ball move separately. They strike the ground at a distance of 20 metres and the bullet at a distance of 100 metres from the post’s foot. The bullet’s initial velocity V is
- a) 250 m/s
- b) 250 √2 m/s
- c) 400 m/s
- d) 500 m/s
Ans. Assume time taken by bullet to fall = t
½ gt = 5
T = 1 sec
Vball x 1= 20; Vball = 20 m/s
Vbullet x 1= 100; Vbullet = 100 m/s
M bullet V = M bullet V bullet + M ball V ball
0.01v = 0.01 x 100 + 0.2 x 20
0.01v = 1 + 4 = 5
∴ V = 500 m/s
The correct answer is option d.
Q. A 20g bullet enters a panel of mass Mp Lkg and then stops moving inside the second panel of mass M2 = 2.98 kg. It is discovered that the two panels, which were previously at rest, now accelerate at equal velocities. Determine the percentage reduction in the bullet’s initial velocity while it is between M1 and M2. Consider any panel material loss as a result of bullet action.
4. If a machine is oil-lubricated,
- a) the machine’s mechanical energy enhances.
- b) the machine’s mechanical efficiency improves.
- c) Its mechanical energy and efficiency both improve.
- d) its efficacy rises while its mechanical advantage falls.
Ans. When a machine is lubricated with oil, friction is reduced. As a result, the machine’s mechanical efficiency improves. The correct answer is option b.
Q. In a resonant cavity with a tuning fork of wavelength 512 Hz, the first resonance comes at a water level of 30.3 cm, and the second resonance comes at a water level of 63.7 cm. The largest potential error in sound speed is
c) 204.8cm/ s
5. Find the right relationship between W1, W2 and W3, wherein W1, W2 and W3 reflect the work done in shifting the material from point A to B via three paths 1, 2, and 3. What will be the gravitational attraction of the point with mass ‘m’.
- a) W1 = W2 = W3
- b) W2 >W1 >W3
- c) W1 < W2 < W3
- d) W1>W2>W3
Ans. In a conservative field, the work performed W is unaffected by the route (from A to B). The starting and ending points determine it. Thus the correct answer is the option a, W1=W2 = W3.
6. A particle moves in simple harmonic motion at frequency f. Its kinetic energy oscillates at frequency.
- a) f/2
- b) f
- c) 2f
- d) 4f
Ans. The kinetic energy of a particle conducting simple harmonic motion will be maximum twice throughout one entire oscillation. The correct answer is 2f.
K.E. oscillation frequency = 2f
Q. A geostationary satellite orbits the Earth in a circular path with a radius of 36,000 kilometres. The time frame of a space probe circling a few hundred kilometres above the Earth’s surface (Rg =6,400km) will then be roughly.
a) 30 minutes
b) 1 hour
c) 2 hour
d) 4 hour
7. In a horizontal circular path, two substances of equal mass begin travelling in different directions from a spot A. The tangential velocities of both the substances are v and 2v, respectively. The substances move at constant rates between impacts. After how many elastic interactions, other than the one at A, would these two particles return to the place A?
- a) 4
- b) 3
- c) 2
- d) 1
Q. When a mass of 9 kg is hung from a sonometer wire, it resonates with a specific tuning fork, creating surface waves with 5 antinodes between the two bridges. When a mass M replaces this mass, the wire resonates with the same tuning fork, resulting in 3 antinodes for the identical bridge locations. M has the value.
a) 5 kg
b) 25 kg
c) 12.5 kg
d) 1/25 kg
8. A particle moves in a simple harmonic motion between the values x = -A and x = +A. T1 is the time it takes to move from 0 to A/2, and T2 is the time it takes to move from A/2 to A. Then
- a) T1 < T2
- b) T1 > T2
c)T1 = T2
- d) T1 = 2T2
Ans. Option a is the correct answer. When the particle moves from the mean position to the absolute position, its velocity decreases from maximum to zero.
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The article supplies students with all the important questions they need to answer to practise for the JEE Main 2022 Physics, Mechanics unit. All these important questions are addressed by the qualified JEE 2022 teachers, who have years of experience preparing students for national-level exams. Students must read these JEE Main 2022 Physics important questions with solutions for gaining further insight into the topic. Students can also enrol in free online LIVE lectures to efficiently prepare for JEE Main 2022 exams.