1. | \(l_2+l_1\) | 2. | \(2(l_2-l_1)\) |
3. | \(5l_1-4l_2\) | 4. | \(5l_2-4l_1\) |
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
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.
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
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