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Chapter 6: Q6.1-2PE (page 221)
Microwave ovens rotate at a rate of about . What is this in revolutions per second? What is the angular velocity in radians per second?
It is 0.1 revolutions per second (rps).
The angular velocity is .
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Two friends are having a conversation. Anna says a satellite in orbit is in freefall because the satellite keeps falling toward Earth. Tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not. Who do you agree with and why?
Newton鈥檚 laws of motion and gravity were among the first to convincingly demonstrate the underlying simplicity and unity in nature. Many other examples have since been discovered, and we now expect to find such underlying order in complex situations. Is there proof that such order will always be found in new explorations?
What is the ideal speed to take a \(100{\rm{ m}}\) radius curve banked at \(20.0^\circ \) angle?
Semi-trailer trucks have an odometer on one hub of a trailer wheel. The hub is weighted so that it does not rotate, but it contains gears to count the number of wheel revolutions鈥攊t then calculates the distance travelled. If the wheel has a 1.15 m diameter and goes through 200,000 rotations, how many kilometres should the odometer read?
Calculate the mass of the Sun based on data for Earth鈥檚 orbit and compare the value obtained with the Sun鈥檚 actual mass.
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