A body constrained to move along the z-axis of a coordinate system is subjected to constant force given by where , and
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 body of mass 0.5 kg travels in a straight line with velocity where . What is the work done by the net force during its displacement from x = 0 to x = 2 m?
1. 50 J
2. 45 J
3. 68 J
4. 90 J
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA bolt of mass 0.3 kg falls from the ceiling of an elevator moving down at a uniform speed of 7 m/s. It hits the floor of the elevator (length of the elevator = 3 m) and does not rebound. What is the heat produced by the impact?
1. 8.82 J
2. 7.65 J
3. 7.01 J
4. 7.98 J
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA body of mass 'm' is released from the top of a fixed rough inclined plane as shown in the figure. If the frictional force has magnitude F, then the body will reach the bottom with a velocity:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe given diagram represents the potential energy curve of a particle in a field. The particle will be in equilibrium at which position(s):
1. B and D
2. A and C
3. A, B, and C
4. A, B, C, and D
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the diagram shown, force F acts on the free end of the string. If the weight W moves up slowly by distance h, then work done on the weight by the string holding it will be: (Pulley and string are ideal)
1. Fh
2. 2Fh
3.
4. 4Fh
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe potential energy of a system increases if work is done:
1. by the system against a conservative force.
2. by the system against a non-conservative force.
3. upon the system by a conservative force.
4. upon the system by a non-conservative force.
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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 & BiologyThe power supplied to a particle of mass 2 kg varies with time as Watt, where t is in seconds. If the velocity of a particle at t = 0 is v = 0, then the velocity of the particle at t = 2 s will be:
1. 1 m/s
2. 4 m/s
3. 2 m/s
4. m/s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology