372176 A block of mass \(2 \mathrm{~kg}\) is placed on the surface of a trolley of mass \(20 \mathrm{~kg}\) which is on a smooth surface. The coefficient of friction between the block and the surface of the trolley is \(\mathbf{0 . 2 5}\). If a horizontal force of \(2 \mathrm{~N}\) acts on the block, the acceleration of the system in \(\mathrm{ms}^{-2}\) is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372177 A block of wood resting on an inclined plane of angle \(30^{\circ}\), just starts moving down. If the coefficients of friction is 0.2 , its velocity (in \(\mathrm{ms}^{-}\) \(\left.{ }^{1}\right)\) after \(5 \mathrm{~s}\) is: \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372178 A \(42 \mathrm{~kg}\) block of ice moving on rough horizontal surface stops due to friction, after sometime. If the initial velocity of the decelerating block is \(4 \mathrm{~ms}^{-1}\), the mass of ice (in kg) that has melted due to the heat generated by the friction is:
(Latent heat of ice is \(3.36 \times 10^{5} \mathbf{J ~ k g}^{-1}\) )

372179 A cubical block of mass \(m\) rests on a rough horizontal surface, \(\mu\) is the block and the surface. A force acting on the cube at an angle \(\theta\) with the vertical side of the cube pulls the block. If the block is to be pulled along the surface, then the value \(\cot (\theta / 2)\) is:

372176 A block of mass \(2 \mathrm{~kg}\) is placed on the surface of a trolley of mass \(20 \mathrm{~kg}\) which is on a smooth surface. The coefficient of friction between the block and the surface of the trolley is \(\mathbf{0 . 2 5}\). If a horizontal force of \(2 \mathrm{~N}\) acts on the block, the acceleration of the system in \(\mathrm{ms}^{-2}\) is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372177 A block of wood resting on an inclined plane of angle \(30^{\circ}\), just starts moving down. If the coefficients of friction is 0.2 , its velocity (in \(\mathrm{ms}^{-}\) \(\left.{ }^{1}\right)\) after \(5 \mathrm{~s}\) is: \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372178 A \(42 \mathrm{~kg}\) block of ice moving on rough horizontal surface stops due to friction, after sometime. If the initial velocity of the decelerating block is \(4 \mathrm{~ms}^{-1}\), the mass of ice (in kg) that has melted due to the heat generated by the friction is:
(Latent heat of ice is \(3.36 \times 10^{5} \mathbf{J ~ k g}^{-1}\) )

372179 A cubical block of mass \(m\) rests on a rough horizontal surface, \(\mu\) is the block and the surface. A force acting on the cube at an angle \(\theta\) with the vertical side of the cube pulls the block. If the block is to be pulled along the surface, then the value \(\cot (\theta / 2)\) is:

372176 A block of mass \(2 \mathrm{~kg}\) is placed on the surface of a trolley of mass \(20 \mathrm{~kg}\) which is on a smooth surface. The coefficient of friction between the block and the surface of the trolley is \(\mathbf{0 . 2 5}\). If a horizontal force of \(2 \mathrm{~N}\) acts on the block, the acceleration of the system in \(\mathrm{ms}^{-2}\) is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372177 A block of wood resting on an inclined plane of angle \(30^{\circ}\), just starts moving down. If the coefficients of friction is 0.2 , its velocity (in \(\mathrm{ms}^{-}\) \(\left.{ }^{1}\right)\) after \(5 \mathrm{~s}\) is: \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372178 A \(42 \mathrm{~kg}\) block of ice moving on rough horizontal surface stops due to friction, after sometime. If the initial velocity of the decelerating block is \(4 \mathrm{~ms}^{-1}\), the mass of ice (in kg) that has melted due to the heat generated by the friction is:
(Latent heat of ice is \(3.36 \times 10^{5} \mathbf{J ~ k g}^{-1}\) )

372179 A cubical block of mass \(m\) rests on a rough horizontal surface, \(\mu\) is the block and the surface. A force acting on the cube at an angle \(\theta\) with the vertical side of the cube pulls the block. If the block is to be pulled along the surface, then the value \(\cot (\theta / 2)\) is:

372176 A block of mass \(2 \mathrm{~kg}\) is placed on the surface of a trolley of mass \(20 \mathrm{~kg}\) which is on a smooth surface. The coefficient of friction between the block and the surface of the trolley is \(\mathbf{0 . 2 5}\). If a horizontal force of \(2 \mathrm{~N}\) acts on the block, the acceleration of the system in \(\mathrm{ms}^{-2}\) is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372177 A block of wood resting on an inclined plane of angle \(30^{\circ}\), just starts moving down. If the coefficients of friction is 0.2 , its velocity (in \(\mathrm{ms}^{-}\) \(\left.{ }^{1}\right)\) after \(5 \mathrm{~s}\) is: \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

372178 A \(42 \mathrm{~kg}\) block of ice moving on rough horizontal surface stops due to friction, after sometime. If the initial velocity of the decelerating block is \(4 \mathrm{~ms}^{-1}\), the mass of ice (in kg) that has melted due to the heat generated by the friction is:
(Latent heat of ice is \(3.36 \times 10^{5} \mathbf{J ~ k g}^{-1}\) )

372179 A cubical block of mass \(m\) rests on a rough horizontal surface, \(\mu\) is the block and the surface. A force acting on the cube at an angle \(\theta\) with the vertical side of the cube pulls the block. If the block is to be pulled along the surface, then the value \(\cot (\theta / 2)\) is: