a system consiting of two fixed and two movable pulley has a mechanical advantag
ID: 1698219 • Letter: A
Question
a system consiting of two fixed and two movable pulley has a mechanical advantage of 4.00 if a force of 136n is exerted, what weight can be raiseddefine efficiency for a simple machine
if the screw pitch of a house jack is increased, would that increase or decrease the mechanical advantage of the house jack
a winch capable of puling 250lb must pull a 2900 load up a ramp of height 6.0 ft. find the lenth of the shortest ramp for this job
find the mechanical advantage of a ramp 18.0m long and 2.00m high.
is it possible to have a 100% efficient machine. Explain.
Explanation / Answer
aa system consiting of two fixed and two movable pulley has a mechanical advantage of 4.00 if a force of 136n is exerted, what weight can be raised It is 136*4=544(N) define efficiency for a simple machine W_output/W_input machanical advantage of a machine = F_output/F_input if the screw pitch of a house jack is increased, would that increase or decrease the mechanical advantage of the house jack no. Because in screw. We have. F*R=F_friction*r. this is horizontal force and it is the same for two screws with different pitch. a winch capable of puling 250lb must pull a 2900 load up a ramp of height 6.0 ft. find the lenth of the shortest ramp for this job find the mechanical advantage of a ramp 18.0m long and 2.00m high. Assume no friction. F=mg*sin(alpha) so alpha=5 degrees. so Length D=6.0/sin(5)=69.6(ft) -------- it is 1/sin(alpha)=18/2=9 is it possible to have a 100% efficient machine. Explain. no, because there is alway friction that make W_output smaller than W_input.
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