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A person pulls a crate with 120 N of force against 100 N of friction a distance of 5 meters. Sketch a free body diagram showing the forces acting on the crate and find the energy the person expends pulling the crate, the amount of energy converted to heat via friction, and the increase in the kinetic energy of the crate.
Detailed explanation of string constraint relation on pulley based problems -
Two metal rods of equal length-one aluminum, the other stainless steel-are connected in parallel with a temperature of 10.0 Celsius at one end and 114 Celsius at the other end. Determine the length the rods must have
The sound intensity 44 m from a wailing tornado siren is 0.10 W/m2 -. Estimate the maximum distance at which the siren can be heard
A 35 kg block of ice slides down a frictionless incline 1.6 m along the diagonal and 0.63 m high, Find the magnitude of the worker's force. How much work is done on the block by the worker's force
a 100 sec long train (as measured at rest) moves in the x-direction with speed B=4/5. what is the position of the front of the train when the rear light is turned on, according to an observer on the ground
a student calculates the unknown liquid to have a density of 0.87 gcm3. if the class average for the density of the
A coin placed on a turntable rotating at 37.9 rev/min will stay there if its center is placed no further than 8.5 cm from the axis of rotation. find the coefficient of friction between the coin and turntable
an astronaut on mars might lean over the edge of 25.0 meter tall spacecraft, How much time will it take for the package to strike the ground
A spherical shell of radius 15cm carries 4.8uC , distributed uniformly over its surface. At the center of the shell is a point charge. What is the field just inside the shell
A 1.00 kg sphere of radius 10.0 cm is rolling down a ramp with ramp angle 30 degrees. What is the acceleration of the center of mass of the sphere
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x10-11 m. Find the magnitude of the electric force.
according to the IOC, an Olympic diving pool must be at least 5m deep. What is the pressure at the bottom of a 5m deep pool
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