A hoop, solid sphere, and solid cylinder each have the same mass and same radius. When rolling down the same incline, which has the greatest torque from gravity on it?
a. the hoop b. the sphere
c. the cylinder d. They all have the same torque.
d
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The mass of a high speed train is 4.5×105kg, and it is traveling forward at a velocity of 8.3×101m/s. Given that momentum equals mass times velocity, determine the values of m and n when the momentum of the train (in kg?m/s) is written in scientific notation.?
A box is dropped onto a conveyor belt moving at 2 m/s. If the coefficient of friction between the box and the belt is 0.3, how long before the box moves without slipping?
According to calculations made by modern astronomers, the age of the universe is close to
A) 14 billion years. B) 7 billion years. C) 21 billion years. D) 6000 years.
Consider the standing wave on a guitar string and the sound wave generated by the guitar as a result of this vibration. What do these two waves have in common?
A) They have the same velocity. B) They have the same wavelength. C) They have the same frequency. D) They have nothing in common.