1) A cart with mass m0=20 kg is being pulled across a horizontal plane by a force F=20 N at an angle of α=60°. Using equations of motion, the time taken to travel a distance d=300 m is calculated as 8.66 minutes, and the velocity at this point is 17.32 m/s.
2) The normal force N acting on the cart is calculated as 182.7 N. Since N<weight, the cart is being lifted by the vertical component of the pulling force.
3) If the coefficient of friction is μ=0.5, the time and velocity are recalculated using this value in the equations of motion.
1) A cart with mass m0=20 kg is being pulled across a horizontal plane by a force F=20 N at an angle of α=60°. Using equations of motion, the time taken to travel a distance d=300 m is calculated as 8.66 minutes, and the velocity at this point is 17.32 m/s.
2) The normal force N acting on the cart is calculated as 182.7 N. Since N<weight, the cart is being lifted by the vertical component of the pulling force.
3) If the coefficient of friction is μ=0.5, the time and velocity are recalculated using this value in the equations of motion.
5. Mod de ansamblare Se fac 3 orificii in partea superioară a stativului pe unde se vor monta cele trei seringi de 100, 5 respectiv 50 ml, la care se atasează cele trei braţe ale dispozitivului. Se scoate pistonul seringii de 100ml pe care o vom folosi ca recipient pentru apa necesară.
6. Se fixeazăelementele de design (petricele, figurine din plastic. Plastelina, coli de carton etc.)
10. Explicaţie: Liftulhidraulic se bazeazăpeprinpiullui Pascal care spune că presiuneapeparcursulunuisistemînchiseste constantă O parte a sistemuluieste un piston care acţionează ca o pompă, cu o forţămecanicărelativmică pe o suprafaţămică a secţiuniitransversale. Cealaltă parte a sistemuluieste un piston cu o suprafaţămai mare, care generează o forţămecanicăcorespunzatoare mare. Este nevoiedoar de un tub cu diametrulmic care rezistă uşor la presiuneîn cazulî n care pompaesteseparată de cilindrul-lift.