75° 40° Given the information above: (1 pt) Which cannon ball will move through

Question

75° 40° Given the information above: (1 pt) Which cannon ball will move through the air further? 1. A a. b. c. m, same initial speed. They will have the same horizontal displacement 10 2. (1 pt) A United Airlines jet is flying at 300 km/hr, while an Air France Concord is speeding along at 1200 km/hr. Both airplanes are flying horizontally at the same altitude when a bomb is discovered on both planes. If they both decide simultaneously to push the bomb out the door, which of the bombs will hit the earth first? (Ignore air resistance a. The United bomb b. The Air France bomb c· They will hit the ground at the same time d. Impossible to determine; it depends on which bomb is heavier. (1 pt) In an effort to create a cannonball-style splash, eight-year old Matthew runs off the edge of a diving board horizontally at 4.6 m/s and falls 2.3 m to the water below. How long does it take for Matthew to fall 2.3 meters and hit the water? Shou your caleulati 3. a. 0.68 s b. 0.50 s c. 0.47s d. 9.8s

Explanation / Answer

Q1.
Option c. same horizontal displacement

Q2.
Option c. They will both hit the ground at the same time

Q3.
s = ut + 1/2at^2
=> -2.3 = -0.5*9.8*t^2
=> t = 0.68 s
So, option a

Q4.
y(t) = yo + voyt – ½ gt2
here yo = 0 (the roof)
voy = vo sin(theta)
So,
y(t) = + vo sin(theta) t – ½ gt^2
= 15m/s * sin25 *3.00s – 9.8m/s2 * 3.00^2
= 15 m/s*0.423*3.00s – 9.8m/s2 * 9
= 19.035 – 44.1
= - 25.1 m
So, the building is 25.1 m tall.

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