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A janitor holds the handle if his mop such that it makes 60 degrees with the floor. if he pushes with a force of 80 lbs, what force will drive the mop against the floor?
Through an earthquake, the top of a building oscillates with amplitude of 32 cm at 1.2 Hz. What is the maximum velocity of the top of the building? What is the maximum acceleration of the top of the building?
A force F= (6x - 2y)N acts on a particle that undergoes a displacement delta r= (3x + y)m. Find (a) the work done by the force on the particle and (b) the angle between F and r.
when an object is placed 67.0 cm from a certain converging lens it forms a real image. when the object is moved to
After 2.00 days, the activity of a sample of an unknown type ofradioactive material has decreased to 84.2% of the initialactivity. What is the half-life of this material
Local noon at 0o longitude corresponds to 12:00UTC. a) Given that our longitude is 84o 28' 33'' W, what is our local noontime in UTC? (b) What local time would this correspond to today? (c) From this and your estimate of the sun's current hour angle,..
A dock worker applies a stable horizontal force of 79.0 {rm N} to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 14.0 {rm m} in the first 6.00 {rm s}.What is the mass of the bl..
A 50.0 kilogram child stands at the rim of a merry-go-round of radius 2.15 meter, rotating with an angular speed of 2.70 rad/s. Find the child centripetal acceleration
The displacement vector for a 15.0 second interval of a jetairplane's flight is ( 2.15e+3, -2430) m. What is the magnitude of the average velocity
When ultraviolet light with a wavelength of 254 nm falls upon a clean metal surface, What is the photoelectric threshold wavelength for this metal
An aircraft weighing 840 Newton is accelerated at 8.3 m/s2 for 5 s, at which time the aircraft launches. Find what force is required to launch the aircraft
A bike wheel with a mass of 2.5 kilogram and a radius of 33 centimeter rolls across a horizontal floor with a translational speed of 1.5 m/s. Compute how far up the ramp will it go before stopping
A non-linear capacitive displacement sensor is constructed using three plates; two fixed and one moveable. Each plate is ‘Y' width and "L" length. The fixed once are separated by a distance "d" as shown below. Assuming that you can measure the cap..
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