Friction, and Inclined Plane Friction Motion
LAWS OF MOTION (ADDITIONAL)

372133 Block \(B\) lying on a table weighs \(W\). The coefficient of static friction between the block and the table is \(\mu\). Assume that the cord between \(B\) and the knot is horizontal. The maximum weight of the block \(A\) for which the system will be stationary is

1 \(\frac{W \tan \theta}{\mu}\)
2 \(\mu \mathrm{W} \tan \theta\)
3 \(\mu \mathrm{W} \sqrt{1+\tan ^{2} \theta}\)
4 \(\mu \mathrm{W} \sin \theta\)
LAWS OF MOTION (ADDITIONAL)

372134 A box of mass \(2 \mathrm{~kg}\) is placed on the roof of a car. The box would remain stationary until the car attains a maximum acceleration. Coefficient of static friction between the box and the roof of the car is 0.2 and \(g=10 \mathrm{~ms}^{-2}\).
The maximum acceleration of the car, for the box to remain stationary, is

1 \(8 \mathrm{~ms}^{-2}\)
2 \(6 \mathrm{~ms}^{-2}\)
3 \(4 \mathrm{~ms}^{-2}\)
4 \(2 \mathrm{~ms}^{-2}\)
LAWS OF MOTION (ADDITIONAL)

372135 Force required to move a mass of \(1 \mathrm{~kg}\) at rest on a horizontal rough plane \((\mu=0.1\) and \(g=9.8\) \(\mathbf{m} / \mathbf{s}^{2}\) ) is

1 \(0.98 \mathrm{~N}\)
2 \(0.49 \mathrm{~N}\)
3 \(9.8 \mathrm{~N}\)
4 \(4.9 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372136 A block kept on a rough surface starts sliding when the inclination of the surface is \(\theta\) with respect to the horizontal. The coefficient of static friction between the block and the surface is :

1 \(\sec \theta\)
2 \(\sin \theta\)
3 \(\tan \theta\)
4 \(\cos \theta\)
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LAWS OF MOTION (ADDITIONAL)

372133 Block \(B\) lying on a table weighs \(W\). The coefficient of static friction between the block and the table is \(\mu\). Assume that the cord between \(B\) and the knot is horizontal. The maximum weight of the block \(A\) for which the system will be stationary is

1 \(\frac{W \tan \theta}{\mu}\)
2 \(\mu \mathrm{W} \tan \theta\)
3 \(\mu \mathrm{W} \sqrt{1+\tan ^{2} \theta}\)
4 \(\mu \mathrm{W} \sin \theta\)
LAWS OF MOTION (ADDITIONAL)

372134 A box of mass \(2 \mathrm{~kg}\) is placed on the roof of a car. The box would remain stationary until the car attains a maximum acceleration. Coefficient of static friction between the box and the roof of the car is 0.2 and \(g=10 \mathrm{~ms}^{-2}\).
The maximum acceleration of the car, for the box to remain stationary, is

1 \(8 \mathrm{~ms}^{-2}\)
2 \(6 \mathrm{~ms}^{-2}\)
3 \(4 \mathrm{~ms}^{-2}\)
4 \(2 \mathrm{~ms}^{-2}\)
LAWS OF MOTION (ADDITIONAL)

372135 Force required to move a mass of \(1 \mathrm{~kg}\) at rest on a horizontal rough plane \((\mu=0.1\) and \(g=9.8\) \(\mathbf{m} / \mathbf{s}^{2}\) ) is

1 \(0.98 \mathrm{~N}\)
2 \(0.49 \mathrm{~N}\)
3 \(9.8 \mathrm{~N}\)
4 \(4.9 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372136 A block kept on a rough surface starts sliding when the inclination of the surface is \(\theta\) with respect to the horizontal. The coefficient of static friction between the block and the surface is :

1 \(\sec \theta\)
2 \(\sin \theta\)
3 \(\tan \theta\)
4 \(\cos \theta\)
LAWS OF MOTION (ADDITIONAL)

372133 Block \(B\) lying on a table weighs \(W\). The coefficient of static friction between the block and the table is \(\mu\). Assume that the cord between \(B\) and the knot is horizontal. The maximum weight of the block \(A\) for which the system will be stationary is

1 \(\frac{W \tan \theta}{\mu}\)
2 \(\mu \mathrm{W} \tan \theta\)
3 \(\mu \mathrm{W} \sqrt{1+\tan ^{2} \theta}\)
4 \(\mu \mathrm{W} \sin \theta\)
LAWS OF MOTION (ADDITIONAL)

372134 A box of mass \(2 \mathrm{~kg}\) is placed on the roof of a car. The box would remain stationary until the car attains a maximum acceleration. Coefficient of static friction between the box and the roof of the car is 0.2 and \(g=10 \mathrm{~ms}^{-2}\).
The maximum acceleration of the car, for the box to remain stationary, is

1 \(8 \mathrm{~ms}^{-2}\)
2 \(6 \mathrm{~ms}^{-2}\)
3 \(4 \mathrm{~ms}^{-2}\)
4 \(2 \mathrm{~ms}^{-2}\)
LAWS OF MOTION (ADDITIONAL)

372135 Force required to move a mass of \(1 \mathrm{~kg}\) at rest on a horizontal rough plane \((\mu=0.1\) and \(g=9.8\) \(\mathbf{m} / \mathbf{s}^{2}\) ) is

1 \(0.98 \mathrm{~N}\)
2 \(0.49 \mathrm{~N}\)
3 \(9.8 \mathrm{~N}\)
4 \(4.9 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372136 A block kept on a rough surface starts sliding when the inclination of the surface is \(\theta\) with respect to the horizontal. The coefficient of static friction between the block and the surface is :

1 \(\sec \theta\)
2 \(\sin \theta\)
3 \(\tan \theta\)
4 \(\cos \theta\)
LAWS OF MOTION (ADDITIONAL)

372133 Block \(B\) lying on a table weighs \(W\). The coefficient of static friction between the block and the table is \(\mu\). Assume that the cord between \(B\) and the knot is horizontal. The maximum weight of the block \(A\) for which the system will be stationary is

1 \(\frac{W \tan \theta}{\mu}\)
2 \(\mu \mathrm{W} \tan \theta\)
3 \(\mu \mathrm{W} \sqrt{1+\tan ^{2} \theta}\)
4 \(\mu \mathrm{W} \sin \theta\)
LAWS OF MOTION (ADDITIONAL)

372134 A box of mass \(2 \mathrm{~kg}\) is placed on the roof of a car. The box would remain stationary until the car attains a maximum acceleration. Coefficient of static friction between the box and the roof of the car is 0.2 and \(g=10 \mathrm{~ms}^{-2}\).
The maximum acceleration of the car, for the box to remain stationary, is

1 \(8 \mathrm{~ms}^{-2}\)
2 \(6 \mathrm{~ms}^{-2}\)
3 \(4 \mathrm{~ms}^{-2}\)
4 \(2 \mathrm{~ms}^{-2}\)
LAWS OF MOTION (ADDITIONAL)

372135 Force required to move a mass of \(1 \mathrm{~kg}\) at rest on a horizontal rough plane \((\mu=0.1\) and \(g=9.8\) \(\mathbf{m} / \mathbf{s}^{2}\) ) is

1 \(0.98 \mathrm{~N}\)
2 \(0.49 \mathrm{~N}\)
3 \(9.8 \mathrm{~N}\)
4 \(4.9 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372136 A block kept on a rough surface starts sliding when the inclination of the surface is \(\theta\) with respect to the horizontal. The coefficient of static friction between the block and the surface is :

1 \(\sec \theta\)
2 \(\sin \theta\)
3 \(\tan \theta\)
4 \(\cos \theta\)