As shown in the figure, two masses of \(10~\text{kg}\) and \(20~\text{kg}\), respectively are connected by a massless spring. A force of \(200~\text{N}\) acts on the \(20~\text{kg}\) mass. At the instant shown, the \(10~\text{kg}\) mass has an acceleration of \(12~\text{m/s}^2\) towards the right. The acceleration of \(20~\text{kg}\) mass at this instant is:
1. \(12~\text{m/s}^2\)
2. \(4~\text{m/s}^2\)
3. \(10~\text{m/s}^2\)
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is the acceleration of block \(A\), if the acceleration of \(B\) is \(4~\text{m/s}^2\) towards the right at the instant shown?
1. \(2.5~\text{m/s}^2\)
2. \(4~\text{m/s}^2\)
3. \(5~\text{m/s}^2\)
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo masses, \(A\) and \(B\), each of mass \(M\) are fixed together by a massless spring. A force acts on the mass \(B\) as shown in the figure. If the mass \(B\) starts moving away from mass \(A\) with acceleration \(a\) in the ground frame, then the acceleration of mass \(A\) will be:
1. | \(Ma-F \over M\) | 2. | \(MF \over F+Ma\) |
3. | \(F+Ma \over M\) | 4. | \(F-Ma \over M\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo blocks, \(A\) and \(B\), of masses \(2m\) and \(4m\) are connected by a string. The block of mass \(4m\) is connected by a spring (massless). The string is suddenly cut. The ratio of the magnitudes of accelerations of masses \(2m\) and \(4m\) at that instant will be:
1. | \(1:2\) | 2. | \(2:1\) |
3. | \(1:4\) | 4. | \(4:1\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThree blocks \(A\), \(B\) and \(C\) of mass \(3M\), \(2M\) and \(M\) respectively are suspended vertically with the help of springs \(\mathrm{PQ}\) and \(\mathrm{TU}\) and a string \(\mathrm{RS}\) as shown in fig. The acceleration of blocks \(A\), \(B\) and \(C\) are \(a_{1} , a_{2}~ \text{and}~ a_{3}\) respectively.
The value of acceleration \(a_{1}\) at the moment string \(\mathrm{RS}\) is cut will be:
1. \(g\) downward
2. \(g\) upward
3. more than \(g\) downward
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA massless and inextensible string connects two blocks \(\mathrm{A}\) and \(\mathrm{B}\) of masses \(3m\) and \(m,\) respectively. The whole system is suspended by a massless spring, as shown in the figure. The magnitudes of acceleration of \(\mathrm{A}\) and \(\mathrm{B}\) immediately after the string is cut, are respectively:
1. | \(\frac{g}{3},g\) | 2. | \(g,g\) |
3. | \(\frac{g}{3},\frac{g}{3}\) | 4. | \(g,\frac{g}{3}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCalculate the reading of the spring balance shown in the figure: (take \(g=10\) m/s2)
1. \(60\) N
2. \(40\) N
3. \(50\) N
4. \(80\) N
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThree blocks each of mass \(m\) are hanged vertically with the help of inextensible strings and ideal springs. Initially, the system was in equilibrium. If at any instant, the lowermost string is cut, then the acceleration of block \(B\) just after cutting the string will be:
1. | \(g\) | 2 | \(g \over 2\) |
3. | \(2g \over 3\) | 4. | zero |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \(l_2+l_1\) | 2. | \(2(l_2-l_1)\) |
3. | \(5l_1-4l_2\) | 4. | \(5l_2-4l_1\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the system shown in the figure is in equilibrium, then the reading of spring balance (in kgf) is:
1. \(10\)
2. \(20\)
3. \(100\)
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology