The tune up specifications of a car call for the spark plugs to be tightened to a torque of 42.0 nm . you plan to tighten the plugs by pulling on the end of a 23.0 cm long wrench. because of the cramped space under the hood, you'll need to pull at an angle of 105 with respect to the wrench shaft.
with what force must you pull?

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 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Anybody wanna ? (picture included? )

Which bonds are found inside a water molecule