A ball rolls down an incline, starting from rest. If the total time it takes to reach the end of the incline is T, how much time has elapsed when it is halfway down the incline?
a. 0.5 T
b. < 0.5 T
c. > 0.5 T
d. More information is needed.
c
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We can describe a location on Earth's surface by stating its
A) altitude and direction (or azimuth). B) meridian and longitude. C) latitude and direction. D) latitude and longitude.
A pendulum is made by letting a 2.0-kg object swing at the end of a string that has a length of 1.5 m. The maximum angle the string makes with the vertical as the pendulum swings is 30°. What is the speed of the object at the lowest point in its trajectory?
a. 2.0 m/s b. 2.2 m/s c. 2.5 m/s d. 2.7 m/s e. 3.1 m/s
Which of the following is thought to explain many of the “exceptions to the rules” of our solar system?
a. the heavy bombardment b. giant impacts c. the frost line d. conservation of angular momentum e. the solar nebula
What do we call a small piece of solar system debris found on Earth?
A) solar system debris B) cometary fragment C) meteor D) meteorite E) meteoroid