A coin is launched horizontally with a speed of 8.0 m/s from the balcony of a fi

Question

A coin is launched horizontally with a speed of 8.0 m/s from the balcony of a fifth-storey apartment. Determine the horizontal velocity of the coin 2.0 s after it is launched. A) 0 m/s (b) 8.0 m/s C) 9.8 m/s D) 19.6 m/s 5 An apparatus is set up so that one golf is launched horizontally while a second identical golf ball is dropped at exactly the same time. Which of the following is correct? Both golf balls will hit the ground at the same time. B) The golf ball that is dropped will hit the ground just before the other. C) The launched golf ball will hit the ground just before the other. D) None of the above 6 A small child stands on the outer edge of a carousel that is3.50m in diameter. What centripetal force will the 35.0 kg child experience if the carousel makes tour revolutions in 10 s? A) 390 N B) 770 N C) 970 N D) 1500 N A space shuttle moves so that it is twice as far from the centre of Earth. How does the force of gravity acting on it change? A)l/4 times F_g B)

Explanation / Answer

here,

6)

diamter , d = 3.5 m

radius , r = d/2 = 1.75 m

mass , m = 35 kg

time period , T = 10 /4 s = 2.5 s

the angular speed , w = 2 * pi /T

w = 2.512 rad/s

the centripital force , F = m * w^2 * r

F = 35 * 2.512^2 * 1.75 = 390 N

the centripital force is A) 390 N

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