The length of a spring is \(l_1\) and \(l_2\) when stretched with a force of \(4\) N and \(5\) N respectively. Its natural length is?
1.
\(l_2+l_1\)
2.
\(2(l_2-l_1)\)
3.
\(5l_1-4l_2\)
4.
\(5l_2-4l_1\)
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Level 3: 35%-60%
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A particle of mass 0.3 kg is subjected to a force F = –kx with k = 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin
1. 5 m/s2
2. 10 m/s2
3. 3 m/s2
4. 15 m/s2
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87%
Level 1: 80%+
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A man is standing at a spring platform. Reading of spring balance is 60 kg-wt. If a man jumps outside the platform, then reading of spring balance:
1. first increases then decrease to zero.
2. decreases.
3. increases.
4. remains same.
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76%
Level 2: 60%+
AIIMS - 2000
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A body of mass 5 kg is suspended by a spring balance on a smooth inclined plane as shown in the figure. The spring balance measure:
1. 50 N
2. 25 N
3. 500 N
4. 10 N
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91%
Level 1: 80%+
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A block of mass 4 kg is suspended through two light spring balances A and B. Then A and B will read respectively
1. 4 kg and zero kg
2. Zero kg and 4 kg
3. 4 kg and 4 kg
4. 2 kg and 2 kg
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74%
Level 2: 60%+
AIIMS - 1995
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