An object falling vertically at a speed of 20 m/s lands in a snowbank and comes to rest 0.5 s later. The object’s average acceleration during this interval is

A. Upward
B. Downward
C. Zero


A. Upward

Physics & Space Science

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A spring is stretched from 0.500 m to 0.800 m. Assume the un-stretched position is 0.00 m. If the spring constant of the spring is 10.0 N/m, what is the work done on the spring?

A. 1.95 J B. 2.21 J C. 2.45 J D. 2.75 J E. 3.01 J

Physics & Space Science

Which of the following does not have a major effect in shaping planetary surfaces?

A) impact cratering B) volcanism C) tectonics D) erosion E) magnetism

Physics & Space Science

Low levels of ionizing radiation

a. are dangerous to the human body. b. can be tolerated by the human body. c. are beneficial to the human body. d. none of the above

Physics & Space Science

Where are the greatest sources of error in this experiment?

Physics & Space Science