The resultant of four forces is 1000 N in the direction 30° west of North. Three forces are 400 N, 60° North of East,200 N south and 400 N 53° west of south. The rectangular components of the fourth force are ??

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature