A 0.223 N downward force is applied to a razor blade resting on a board. The...
1. A constant external force at a downward angle of 30 degrees from hortzontal is applied to a o-kg box, which is on a rough horizontal surface. While the force pushes the box a distance of 8.00m, the speeds up from 0.500 m/s to 2.60 m/s. The work done by friction, in 3, during this process is-1040 3. What is the force, in N ? 3 2. An ideal spring is hung vertically from the celling. When a -kg mass...
A person pushes with a force of 10.0 N on a stick pin to try to push it into a bulletin board. If the tip of the needle is a circle with a radius of 0.12 mm, then what is the average pressure on the board at the tip of the pin 2.120E + 08 Pa 1.685E + 08 Pa 2.495E + 08 Pa 2.526E + 08 Pa 1.931E + 08 Pa 2.236E + 08 Pa An object has a...
A 10.0 kg block is resting on a horizontal surface when a force P is applied to it for 7.00 seconds. The variation of P with time is shown in the figure where P is in Newtons and t is in seconds. If the coefficients of static and kinetic friction between the block and the surface are μs = 0.600 and μk = 0.400 respectively, and g = 10.0 m/s2 calculate a) [2] The time t_1 at which the block...
Video Example EXAMPLE 1 A dam has the shape of a trapezoid shown in the top figure. The height is 20 m and the width is 40 m at the top and 20 m at the bottom. Find the force on the dam due to hydrostatic pressure if the water level is 6 m from the top of the dam. 40 m SOLUTION We choose a vertical x-axis with origin at the surface of the water and directed downward as...
1. A force of 5.78x10-16 N acts on an unknown particle that travels at a 90 ° angle through a magnetic field. the velocity of the particle is 5.65x104 m / s and the field is 3.20x10–2 T, how many elementary charges does the particle carry? 2.What potential must be applied to a source of mass ions (9.99x1027 kg) to be accelerated by a region where there is a 1.2 T perpendicular magnetic field, if the minimum electric field to...