A scooter has wheels with a diameter of 120 mm. What is the angular speed of the wheels when the scooter is moving forward at 6.00 m/s?

A) 47.7 rpm
B) 955 rpm
C) 72.0 rpm
D) 50.0 rpm
E) 100 rpm


B

Physics & Space Science

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Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?

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A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 300 m. How fast can she swim in still water?

A) 1.24 m/s B) 1.83 m/s C) 0.50 m/s D) 1.42 m/s E) 0.25 m/s

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The quark and antiquark in a meson are always of the same flavor

a. True b. False Indicate whether the statement is true or false

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A 25-N force is needed to move an object with a constant velocity of 2.0 m/s. What power must be delivered to the object by the force?

A) 0.50 W B) 1.0 W C) 5.0 W D) 50 W E) 100 W

Physics & Space Science