Jason and alejandro lift a chair 2 meters into the moving truck using 150 newtons of force. it takes them 3 seconds to lift the chair how much power did they use

As we know that rate of work done is given as power

so here we will first find the work done

Work is the product of force and displacement

so here we have

now we have

now in order to find power we will use

so power consumed will be 100 W

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

trig 15.3 cos