In an experiment that measures how fast a student reacts, a meter stick dropped from rest falls 0.20 meter before the student catches it. The reaction time of the student is approximately A) 0.10 s
B) 0.20 s
C) 0.30 s
D) 0.40 s

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?