Subliniază răspunsul corect: În acelaşi timp un corp se poate / nu se poate afla în mai multe tipuri de echilibru. O minge va tinde să ocupe poziţii cât mai joase / înalte pe o suprafaţă de sprijin. La o curbă spre stânga şoselele sunt înclinate astfel încât, când plouă, apa se scurge spre exteriorul / interiorul curbei. Acrobaţii folosesc o bară lungă şi subţire (un balansier) / un toiag pentru a-şi menţine echilibrul când merg pe sârmă.

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume