The bob of a pendulum is released from a horizontal position. If the length of the pendulum is 1.5 m, what is the speed with which the bob arrives at the lowermost point, given that it dissipated 5% of its initial energy against air resistance?
1. 2.5 m/s
2. 3.9 m/s
3. 4.7 m/s
4. 5.3 m/s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA ball is dropped from a height of \(5\) m. If it rebounds up to a height of \(1.8\) m, then the ratio of velocities of the ball after and before the rebound will be:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen an object is shot from the bottom of a long, smooth inclined plane kept at an angle of \(60^\circ\) with horizontal, it can travel a distance \(x_1\) along the plane. But when the inclination is decreased to \(30^\circ\) and the same object is shot with the same velocity, it can travel \(x_2\) distance. Then \(x_1:x_2\) will be:
1. \(1:2\sqrt{3}\)
2. \(1:\sqrt{2}\)
3. \(\sqrt{2}:1\)
4. \(1:\sqrt{3}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf a stone is projected vertically upward from the ground at a speed of 10 m/s, then it's: (g = 10 )
1. Potential energy will be maximum after 0.5 s
2. Kinetic energy will be maximum again after 1 s
3. Kinetic energy = potential energy at a height of 2.5 m from the ground
4. Potential energy will be minimum after 1 s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA block of mass \(M\) is attached to the lower end of a vertical spring. The spring is hung from the ceiling and has a force constant value of \(k.\) The mass is released from rest with the spring initially unstretched. The maximum extension produced along the length of the spring will be:
1. \(Mg/k\)
2. \(2Mg/k\)
3. \(4Mg/k\)
4. \(Mg/2k\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA ball is thrown vertically downwards from a height of 20 m with an initial velocity vo. It collides with the ground, loses 50% of its energy in a collision and rebounds to the same height. The initial velocity vo is: (Take g = 10 ms-2)
1. 14 ms-1
2. 20 ms-1
3. 28 ms-1
4. 10 ms-1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA spherical ball of mass \(20\) kg is stationary at the top of a hill of height\(100\) m. It slides down a smooth surface to the ground, then climbs up another hill of height \(30\) m and finally slides down to a horizontal base at a height of \(20\) m above the ground. The velocity attained by the ball is:
1. \(10 \) m/s
2. \(10 \sqrt{30} \) m/s
3. \(40 \) m/s
4. \(20 \) m/s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe principle of conservation of energy implies that:
1. the total mechanical energy is conserved.
2. the total kinetic energy is conserved.
3. the total potential energy is conserved.
4. the sum of all types of energies is conserved.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe potential energy of a 1 kg particle free to move along the x-axis is given by:
The total mechanical energy of the particle is 2J. Then, the maximum speed (in ms-1) will be
1. \(3 \over \sqrt{2} \)
2. \(\sqrt{2}\)
3. \(1 \over \sqrt{2}\)
4. 2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology