Graphical Analysis: If the position versus time graph of an object is a horizontal line, the object is
A. moving with constant non-zero speed.
B. moving with constant non-zero acceleration.
C. at rest.
D. moving with increasing speed.
Answer: C
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A car starting from rest accelerates at a constant 2.0 m/s2 for 10 s. It then travels with constant speed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s2
How far does it travel after starting? A) 200 m B) 400 m C) 500 m D) 300 m
The largest asteroid, and probably the only one to be a spherical "world," is
A) Ceres. B) Ida. C) Vesta. D) Gaspra. E) Eros.
The ______________ surrounds the nucleus of a comet
Fill in the blank(s) with correct word
A bucket is being lowered by a very light rope with a constant downward velocity. The tension in the rope must be
A) equal to the weight of the bucket. B) greater than the weight of the bucket. C) less than the weight of the bucket.