Forces in Mechanism
LAWS OF MOTION (ADDITIONAL)

371889 Two block \(A\) and \(B\) of masses \(1.5 \mathrm{~kg}\) and \(0.5 \mathrm{~kg}\), respectively are connected by a massless inextensible string passing over a frictionless pulley as shown in the figure. Block \(A\) is lifted until block B touches the ground and then block \(A\) is released. The initial height of block \(A\) is \(80 \mathrm{~cm}\) when block \(B\) just touches the ground. The maximum height reached by block \(B\) from the ground after the block \(A\) falls on the ground is

1 \(80 \mathrm{~cm}\)
2 \(120 \mathrm{~cm}\)
3 \(140 \mathrm{~cm}\)
4 \(160 \mathrm{~cm}\)
LAWS OF MOTION (ADDITIONAL)

371890 Two blocks of masses ' \(\mathrm{m}_{1}\) ' and ' \(\mathrm{m}_{2}\) ' are suspended by a massless string passing over a smooth pulley, if the acceleration of the system
is \(\frac{g}{8}\) then the ratio of the masses \(\frac{m_{2}}{m_{1}}=\)

1 \(8: 1\)
2 \(8: 7\)
3 \(9: 7\)
4 \(4: 3\)
LAWS OF MOTION (ADDITIONAL)

371891 A man weighing \(60 \mathrm{~kg}\) is in lift moving down with an acceleration of \(1.8 \mathrm{~ms}^{-2}\). The force exerted by the floor on him is :

1 \(588 \mathrm{~N}\)
2 \(480 \mathrm{~N}\)
3 zero
4 \(696 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371892 If the block moves up with constant velocity \(v\) \(\mathrm{m} / \mathrm{s}\), then find \(\mathrm{F}\).

1 \(\mathrm{F}=\frac{\mathrm{mg}}{2}\)
2 \(F=\frac{2 m g}{3}\)
3 \(\mathrm{F}=\frac{\mathrm{mg}}{3}\)
4 \(\mathrm{F}=\frac{5 \mathrm{mg}}{3}\)
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LAWS OF MOTION (ADDITIONAL)

371889 Two block \(A\) and \(B\) of masses \(1.5 \mathrm{~kg}\) and \(0.5 \mathrm{~kg}\), respectively are connected by a massless inextensible string passing over a frictionless pulley as shown in the figure. Block \(A\) is lifted until block B touches the ground and then block \(A\) is released. The initial height of block \(A\) is \(80 \mathrm{~cm}\) when block \(B\) just touches the ground. The maximum height reached by block \(B\) from the ground after the block \(A\) falls on the ground is

1 \(80 \mathrm{~cm}\)
2 \(120 \mathrm{~cm}\)
3 \(140 \mathrm{~cm}\)
4 \(160 \mathrm{~cm}\)
LAWS OF MOTION (ADDITIONAL)

371890 Two blocks of masses ' \(\mathrm{m}_{1}\) ' and ' \(\mathrm{m}_{2}\) ' are suspended by a massless string passing over a smooth pulley, if the acceleration of the system
is \(\frac{g}{8}\) then the ratio of the masses \(\frac{m_{2}}{m_{1}}=\)

1 \(8: 1\)
2 \(8: 7\)
3 \(9: 7\)
4 \(4: 3\)
LAWS OF MOTION (ADDITIONAL)

371891 A man weighing \(60 \mathrm{~kg}\) is in lift moving down with an acceleration of \(1.8 \mathrm{~ms}^{-2}\). The force exerted by the floor on him is :

1 \(588 \mathrm{~N}\)
2 \(480 \mathrm{~N}\)
3 zero
4 \(696 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371892 If the block moves up with constant velocity \(v\) \(\mathrm{m} / \mathrm{s}\), then find \(\mathrm{F}\).

1 \(\mathrm{F}=\frac{\mathrm{mg}}{2}\)
2 \(F=\frac{2 m g}{3}\)
3 \(\mathrm{F}=\frac{\mathrm{mg}}{3}\)
4 \(\mathrm{F}=\frac{5 \mathrm{mg}}{3}\)
LAWS OF MOTION (ADDITIONAL)

371889 Two block \(A\) and \(B\) of masses \(1.5 \mathrm{~kg}\) and \(0.5 \mathrm{~kg}\), respectively are connected by a massless inextensible string passing over a frictionless pulley as shown in the figure. Block \(A\) is lifted until block B touches the ground and then block \(A\) is released. The initial height of block \(A\) is \(80 \mathrm{~cm}\) when block \(B\) just touches the ground. The maximum height reached by block \(B\) from the ground after the block \(A\) falls on the ground is

1 \(80 \mathrm{~cm}\)
2 \(120 \mathrm{~cm}\)
3 \(140 \mathrm{~cm}\)
4 \(160 \mathrm{~cm}\)
LAWS OF MOTION (ADDITIONAL)

371890 Two blocks of masses ' \(\mathrm{m}_{1}\) ' and ' \(\mathrm{m}_{2}\) ' are suspended by a massless string passing over a smooth pulley, if the acceleration of the system
is \(\frac{g}{8}\) then the ratio of the masses \(\frac{m_{2}}{m_{1}}=\)

1 \(8: 1\)
2 \(8: 7\)
3 \(9: 7\)
4 \(4: 3\)
LAWS OF MOTION (ADDITIONAL)

371891 A man weighing \(60 \mathrm{~kg}\) is in lift moving down with an acceleration of \(1.8 \mathrm{~ms}^{-2}\). The force exerted by the floor on him is :

1 \(588 \mathrm{~N}\)
2 \(480 \mathrm{~N}\)
3 zero
4 \(696 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371892 If the block moves up with constant velocity \(v\) \(\mathrm{m} / \mathrm{s}\), then find \(\mathrm{F}\).

1 \(\mathrm{F}=\frac{\mathrm{mg}}{2}\)
2 \(F=\frac{2 m g}{3}\)
3 \(\mathrm{F}=\frac{\mathrm{mg}}{3}\)
4 \(\mathrm{F}=\frac{5 \mathrm{mg}}{3}\)
LAWS OF MOTION (ADDITIONAL)

371889 Two block \(A\) and \(B\) of masses \(1.5 \mathrm{~kg}\) and \(0.5 \mathrm{~kg}\), respectively are connected by a massless inextensible string passing over a frictionless pulley as shown in the figure. Block \(A\) is lifted until block B touches the ground and then block \(A\) is released. The initial height of block \(A\) is \(80 \mathrm{~cm}\) when block \(B\) just touches the ground. The maximum height reached by block \(B\) from the ground after the block \(A\) falls on the ground is

1 \(80 \mathrm{~cm}\)
2 \(120 \mathrm{~cm}\)
3 \(140 \mathrm{~cm}\)
4 \(160 \mathrm{~cm}\)
LAWS OF MOTION (ADDITIONAL)

371890 Two blocks of masses ' \(\mathrm{m}_{1}\) ' and ' \(\mathrm{m}_{2}\) ' are suspended by a massless string passing over a smooth pulley, if the acceleration of the system
is \(\frac{g}{8}\) then the ratio of the masses \(\frac{m_{2}}{m_{1}}=\)

1 \(8: 1\)
2 \(8: 7\)
3 \(9: 7\)
4 \(4: 3\)
LAWS OF MOTION (ADDITIONAL)

371891 A man weighing \(60 \mathrm{~kg}\) is in lift moving down with an acceleration of \(1.8 \mathrm{~ms}^{-2}\). The force exerted by the floor on him is :

1 \(588 \mathrm{~N}\)
2 \(480 \mathrm{~N}\)
3 zero
4 \(696 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371892 If the block moves up with constant velocity \(v\) \(\mathrm{m} / \mathrm{s}\), then find \(\mathrm{F}\).

1 \(\mathrm{F}=\frac{\mathrm{mg}}{2}\)
2 \(F=\frac{2 m g}{3}\)
3 \(\mathrm{F}=\frac{\mathrm{mg}}{3}\)
4 \(\mathrm{F}=\frac{5 \mathrm{mg}}{3}\)