A roller coaster, loaded with passengers, has a mass of 3000 kg; the radius of curvature of the track at the bottom point of the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track? (g = 9.8 m/s2)

a. 2.3 × 10^4 N
c. 7.0 × 10^4 N
b. 4.7 × 10^4 N
d. 1.0 × 10^4 N


C

Physics & Space Science

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Which of the following sound frequencies lie(s) outside the audible range?

a. 14 Hz b. 11 kHz c. 2700 Hz d. All of these

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What will be an ideal response?

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The process in which thermal energy flows by the mass movement of molecules from one place to another is known as

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