Abilliard ball, labeled 1, moving horizontally strikes another billiard ball, labeled 2, at rest. before impact, ball 1 was moving at a speed of 3.00 m/s, and after impact it is moving at 0.50 m/s at 50° from the original direction. if the two balls have equal masses of 300 g, what is the velocity of the ball 2 after the impact?

(a) 2.7 m/s, 8.1° from the original direction
(b) 2.3 m/s, 4.7° from the original direction
(c) 2.3 m/s, 6.2° from the original direction
(d) 2.7 m/s, 9.4° from the original direction

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

lol

explanation:

momentum of soft ball three times less than baskey ball

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.