Quattro masse, rispettivamente di 1.0 kg, 2.0 kg, 3.0 kg e 4.0 kg, sono poste nei vertici di un rettangolo, il cui lato maggiore misura 0.20 m e quello minore misura 0.10 m. a) Determinare modulo, direzione e verso della forza risultante che agisce sulla massa di 2.0 kg.
b) Come variano le risposte della domanda precedente se le lunghezze di tutti i lati vengono raddoppiate?

Which of the following is an example of motion in two dimensions?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

Hunter’s velocity was 4.5 m/s. at the end of his race, his velocity was the same. which best describes his movement? his movement stopped. his acceleration is zero. his time was constant. his acceleration was positive.