372167 An inclined plane making an angle \(30^{\circ}\) with the horizontal is placed in a uniform horizontal electric field of \(100 \mathrm{Vm}^{-1}\). A particle of mass 1 \(\mathrm{kg}\) and charge \(0.01 \mathrm{C}\) is allowed to slide down from rest from the top of the inclined plane. If the coefficient or friction is 0.2 , the particle reaches the bottom of the inclined plane in 1 second. Then the length of the inclined plane is (Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )

372168 A block of ice of mass \(50 \mathrm{~kg}\) is sliding on a horizontal plane. It starts with speed \(5 \mathrm{~m} / \mathrm{s}\) and stops after moving through some distance. The mass of ice that has melted due to friction between the block and the surface is (Assuming that no energy is lost and latent heat of fusion of ice is \(80 \mathrm{cal} / \mathrm{g}, \mathbf{J}=4.2 \mathrm{~J} / \mathrm{cal}\) )

372169 A \(3 \mathrm{~kg}\) block is placed over a \(10 \mathrm{~kg}\) block and both are placed on a smooth horizontal surface. The coefficient of friction between the blocks is 0.2. If a horizontal force of \(20 \mathrm{~N}\) is applied to 3 \(\mathrm{kg}\) block, accelerations of the two blocks in \(\mathrm{ms}^{-2}\) are \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

372170 A body of mass \(300 \mathrm{~kg}\) is moved through \(10 \mathrm{~m}\) along a smooth inclined plane of angle \(30^{\circ}\). The work done in moving in joules is \(\left(\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right)\)

372167 An inclined plane making an angle \(30^{\circ}\) with the horizontal is placed in a uniform horizontal electric field of \(100 \mathrm{Vm}^{-1}\). A particle of mass 1 \(\mathrm{kg}\) and charge \(0.01 \mathrm{C}\) is allowed to slide down from rest from the top of the inclined plane. If the coefficient or friction is 0.2 , the particle reaches the bottom of the inclined plane in 1 second. Then the length of the inclined plane is (Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )

372168 A block of ice of mass \(50 \mathrm{~kg}\) is sliding on a horizontal plane. It starts with speed \(5 \mathrm{~m} / \mathrm{s}\) and stops after moving through some distance. The mass of ice that has melted due to friction between the block and the surface is (Assuming that no energy is lost and latent heat of fusion of ice is \(80 \mathrm{cal} / \mathrm{g}, \mathbf{J}=4.2 \mathrm{~J} / \mathrm{cal}\) )

372169 A \(3 \mathrm{~kg}\) block is placed over a \(10 \mathrm{~kg}\) block and both are placed on a smooth horizontal surface. The coefficient of friction between the blocks is 0.2. If a horizontal force of \(20 \mathrm{~N}\) is applied to 3 \(\mathrm{kg}\) block, accelerations of the two blocks in \(\mathrm{ms}^{-2}\) are \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

372170 A body of mass \(300 \mathrm{~kg}\) is moved through \(10 \mathrm{~m}\) along a smooth inclined plane of angle \(30^{\circ}\). The work done in moving in joules is \(\left(\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right)\)

372167 An inclined plane making an angle \(30^{\circ}\) with the horizontal is placed in a uniform horizontal electric field of \(100 \mathrm{Vm}^{-1}\). A particle of mass 1 \(\mathrm{kg}\) and charge \(0.01 \mathrm{C}\) is allowed to slide down from rest from the top of the inclined plane. If the coefficient or friction is 0.2 , the particle reaches the bottom of the inclined plane in 1 second. Then the length of the inclined plane is (Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )

372168 A block of ice of mass \(50 \mathrm{~kg}\) is sliding on a horizontal plane. It starts with speed \(5 \mathrm{~m} / \mathrm{s}\) and stops after moving through some distance. The mass of ice that has melted due to friction between the block and the surface is (Assuming that no energy is lost and latent heat of fusion of ice is \(80 \mathrm{cal} / \mathrm{g}, \mathbf{J}=4.2 \mathrm{~J} / \mathrm{cal}\) )

372169 A \(3 \mathrm{~kg}\) block is placed over a \(10 \mathrm{~kg}\) block and both are placed on a smooth horizontal surface. The coefficient of friction between the blocks is 0.2. If a horizontal force of \(20 \mathrm{~N}\) is applied to 3 \(\mathrm{kg}\) block, accelerations of the two blocks in \(\mathrm{ms}^{-2}\) are \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

372170 A body of mass \(300 \mathrm{~kg}\) is moved through \(10 \mathrm{~m}\) along a smooth inclined plane of angle \(30^{\circ}\). The work done in moving in joules is \(\left(\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right)\)

372167 An inclined plane making an angle \(30^{\circ}\) with the horizontal is placed in a uniform horizontal electric field of \(100 \mathrm{Vm}^{-1}\). A particle of mass 1 \(\mathrm{kg}\) and charge \(0.01 \mathrm{C}\) is allowed to slide down from rest from the top of the inclined plane. If the coefficient or friction is 0.2 , the particle reaches the bottom of the inclined plane in 1 second. Then the length of the inclined plane is (Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )

372168 A block of ice of mass \(50 \mathrm{~kg}\) is sliding on a horizontal plane. It starts with speed \(5 \mathrm{~m} / \mathrm{s}\) and stops after moving through some distance. The mass of ice that has melted due to friction between the block and the surface is (Assuming that no energy is lost and latent heat of fusion of ice is \(80 \mathrm{cal} / \mathrm{g}, \mathbf{J}=4.2 \mathrm{~J} / \mathrm{cal}\) )

372169 A \(3 \mathrm{~kg}\) block is placed over a \(10 \mathrm{~kg}\) block and both are placed on a smooth horizontal surface. The coefficient of friction between the blocks is 0.2. If a horizontal force of \(20 \mathrm{~N}\) is applied to 3 \(\mathrm{kg}\) block, accelerations of the two blocks in \(\mathrm{ms}^{-2}\) are \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

372170 A body of mass \(300 \mathrm{~kg}\) is moved through \(10 \mathrm{~m}\) along a smooth inclined plane of angle \(30^{\circ}\). The work done in moving in joules is \(\left(\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right)\)