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Probleme de fizica - didactic.ro

Probleme de fizica

Probleme de fizica

Mesajde vdesign » 16 Oct 2007, 19:19

Hey salut tuturor. Am si eu 5 probleme de fizica la care as dori un pic de ajutor. Din pacate sunt in engleza, dar daca e STRICT NECESAR pot sa explic contextu sau chiar sa fac rost de ele in romana si pot sa si bag imagini. Mersi MULT!



1.
A ship is launched toward the water on a slipway making an angle of 5 degrees with the horizontal direction. The coefficient of kinetic friction between the bottom of the ship and the slipway is uk = 0.08 . What is the speed of the ship after accelerating from rest through a distance of 120m down the slip-way to the water?



2.
An automobile traveling at speed v on a level surface approaches a brick wall. When the automobile is at a distance d from the wall, the driver suddenly realizes that he must either brake or turn. If the coefficient of static friction between the tires and the surface is us , what is the minimum distance that the driver needs to stop (without turning)? What is the minimum distance that the driver needs to complete a 90 degree turn (without breaking)? What is the safest tactic for the driver?



3.
A puck of mass m1=1.50kg slides in a circle of radius R = 20.0cm on a frictionless table while attached to a hanging cylinder of mass m2=2.50kg by a cord through a hole in the table. What speed keeps the cylinder at rest?

4.A block of mass 3.00 kg is pushed up against a wall by a force P that makes a50.0 degree angle with the horizontal as shown in the diagram.
The coefficient of static friction between the block and the wall is 0.250. Determine the possible values for the magnitude of P that allow the block to remain stationary.



5.
The Midas II spy satellite was launched into a circular orbit at a height of 500km above the surface of the Earth. Calculate the orbital period of this satellite.
vdesign
 
Mesaje: 1
Membru din: 16 Oct 2007, 19:11

Mesajde iace » 17 Oct 2007, 14:22

Eu cred ca ai putin cam mult tupeu cand ne rogi sa te ajutam asa, fara traducere, fara figura.... Nu toti is doctori la engleza. Ia baga traducerea si figurile si te ajutam la rezolvare. Nu par grele, dar stii ca intr-o problema fiecare cuvant conteaza...
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iace
 
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Membru din: 18 Sep 2004, 15:16
Localitate: Suceava


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