Assuming that the angle at which you push on the edge of the box is again 45∘, with what magnitude of force fp should you push if the box were to slide down the wall at a constant velocity? note that, in general, the magnitude of the friction force will change if you change the magnitude of the pushing force. thus, for this part, assume that the magnitude of the friction force is f=0.516fp.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j