A can, after having been given a kick, moves up along a smooth hill of ice. It will
A) have a varying acceleration along the hill.
B) have the same acceleration, both up the hill and down the hill.
C) have a constant acceleration up the hill, but a larger constant acceleration when it comes back down the hill.
D) have a constant acceleration up the hill, but a smaller constant acceleration when it comes back down the hill.
E) travel at constant velocity.
B
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A car is driven between two nearby towns at an average speed of 50 miles/hour. The magnitude of the average velocity of the car
A. will always be the same as the average speed. B. will always be greater than the average speed. C. will be the same as or less than the average speed. D. will be the same as or greater than the average speed. E. will always be less than the average speed.
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 turns through 2.4 revolutions during a 2.0-s time interval. What is the angular velocity at the end of this time interval?
A. 9.5 rad/s B. 9.7 rad/s C. 9.3 rad/s D. 9.1 rad/s E. 8.8 rad/s
The gas in a perfectly insulated system does work at a rate of 13 W. At what rate is the internal (thermal) energy of the gas changing?
A) -13 W B) 13 W C) 0.00 W D) 6.5 W
O and B stars are examples of ________________ that are used to outline the arms in a galaxy like the Milky Way galaxy
Fill in the blank(s) with correct word