270215 An eraser weighing\(2 \mathrm{~N}\) is pressed against the black board with a force of \(5 \mathrm{~N}\). The coefficient of friction is 0.4 . How much force parallel to the black board is required to slide the eraser upwards

270216 A marble block of mass\(\mathbf{2} \mathbf{~ k g}\) lying on ice when given a velocity of \(6 \mathrm{~ms}^{-1}\) is stopped by friction in \(10 \mathrm{~s}\). Then the coefficient of friction is \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

270217 A block of weight\(100 \mathrm{~N}\) is pushed by a force F on a horizontal rough plane moving with an acceleration \(1 \mathrm{~m} / \mathrm{s}^{2}\), when force is doubled its acceleration becomes \(10 \mathrm{~m} / \mathrm{s}^{2}\). The coefficient of friction is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

270218 A block of mass\(5 \mathrm{~kg}\) is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and \(g=10 \mathrm{~ms}^{-2}\). If a horizontal force of \(50 \mathrm{~N}\) is applied on the block, the frictional force is

270215 An eraser weighing\(2 \mathrm{~N}\) is pressed against the black board with a force of \(5 \mathrm{~N}\). The coefficient of friction is 0.4 . How much force parallel to the black board is required to slide the eraser upwards

270216 A marble block of mass\(\mathbf{2} \mathbf{~ k g}\) lying on ice when given a velocity of \(6 \mathrm{~ms}^{-1}\) is stopped by friction in \(10 \mathrm{~s}\). Then the coefficient of friction is \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

270217 A block of weight\(100 \mathrm{~N}\) is pushed by a force F on a horizontal rough plane moving with an acceleration \(1 \mathrm{~m} / \mathrm{s}^{2}\), when force is doubled its acceleration becomes \(10 \mathrm{~m} / \mathrm{s}^{2}\). The coefficient of friction is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

270218 A block of mass\(5 \mathrm{~kg}\) is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and \(g=10 \mathrm{~ms}^{-2}\). If a horizontal force of \(50 \mathrm{~N}\) is applied on the block, the frictional force is

270215 An eraser weighing\(2 \mathrm{~N}\) is pressed against the black board with a force of \(5 \mathrm{~N}\). The coefficient of friction is 0.4 . How much force parallel to the black board is required to slide the eraser upwards

270216 A marble block of mass\(\mathbf{2} \mathbf{~ k g}\) lying on ice when given a velocity of \(6 \mathrm{~ms}^{-1}\) is stopped by friction in \(10 \mathrm{~s}\). Then the coefficient of friction is \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

270217 A block of weight\(100 \mathrm{~N}\) is pushed by a force F on a horizontal rough plane moving with an acceleration \(1 \mathrm{~m} / \mathrm{s}^{2}\), when force is doubled its acceleration becomes \(10 \mathrm{~m} / \mathrm{s}^{2}\). The coefficient of friction is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

270218 A block of mass\(5 \mathrm{~kg}\) is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and \(g=10 \mathrm{~ms}^{-2}\). If a horizontal force of \(50 \mathrm{~N}\) is applied on the block, the frictional force is

270215 An eraser weighing\(2 \mathrm{~N}\) is pressed against the black board with a force of \(5 \mathrm{~N}\). The coefficient of friction is 0.4 . How much force parallel to the black board is required to slide the eraser upwards

270216 A marble block of mass\(\mathbf{2} \mathbf{~ k g}\) lying on ice when given a velocity of \(6 \mathrm{~ms}^{-1}\) is stopped by friction in \(10 \mathrm{~s}\). Then the coefficient of friction is \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

270217 A block of weight\(100 \mathrm{~N}\) is pushed by a force F on a horizontal rough plane moving with an acceleration \(1 \mathrm{~m} / \mathrm{s}^{2}\), when force is doubled its acceleration becomes \(10 \mathrm{~m} / \mathrm{s}^{2}\). The coefficient of friction is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

270218 A block of mass\(5 \mathrm{~kg}\) is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and \(g=10 \mathrm{~ms}^{-2}\). If a horizontal force of \(50 \mathrm{~N}\) is applied on the block, the frictional force is