When you start sliding the couch, you have to overcome the static friction of the carpeted floor, which is usually very big, especially due to the texture of the carpet. However, as long as you get it moving, you only have to apply the force to overcome the kinetic friction, which is smaller than the static friction.
Answer:
44.71 mi/h
11.17 mi
Explanation:
To express the velocity in the S.I. you use the following equality:
then, by replacing you obtain:
When the car has traveled while 15 minutes you have:
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TRANSLATION:
Para expresar la velocidad en el S.I., utiliza la siguiente igualdad:
entonces, al reemplazar, obtienes:
Cuando el automóvil ha viajado durante 15 minutos, tiene:
Let
dV = dt = water is flowing in at a rate of 12 ft3 / min.
h = the depth of the water.
dh / dt = the rate of change of the depth.
First you must find the volume of the cone as a function of "h". Then you must derive the volume of the cone with respect to time. Finally clear dh / dt.
I attach the solution.
186 netwons on Mars and 490 netwons on earth
Answer:
where
Pa = Gravitational potential energy of satellite A
Pb = Gravitational potential energy of satellite B
G = gravitational constant
Me = Mass of the earth
Ma = Mass of satellite A
Mb = Mass of satellite B
Re = Radius of the earth
Pb/Pa = (-GMeMb/Re) / (-GMeMa/Re)
Pb/Pa = Mb/Ma
Explanation: