An object of mass 4.0 kg is thrown vertically upwards from ground level with an initial speed of 20 m/s. Ignore friction and use g = 10 m/s2. How high did the object go?
A) 20 m
B) 4.5 m
C) 15 m
D) 80 m
E) None of the other choices is correct.
Question 2
An object is moving with constant non-zero acceleration in the +x-axis. The position versus time graph of this object is
A) a horizontal straight line.
B) a vertical straight line.
C) a straight line making an angle with the time axis.
D) a parabolic curve.
E) a hyperbolic curve.
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