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If you drop a feather and penny in a vacuum ( no resistance), which one would hit the
ground first? - Correct Answer-They will hit at the same time.
If you drop a feather and penny in air, which one would hit the ground first? - Correct
Answer-The penny will hit first.
According to kinematics (x=.5g*t2), the acceleration is dependant only upon - Correct
Answer-Where the object is located.
Given the kinematics equation for the motion of an object falling from rest, x=.5g*t2),
what kind of relationship is predicted between x and t? (select all that apply) - Correct
Answer--displacement, x, is proportional to the square of the time, t2.
-displacement, x, and time, t, obey a power law.
-x=k*t2, where k is a constant.
If you plotted x vs. t2, for an object falling from rest (assuming down to be positive),
what should the graph look like? - Correct Answer-- y-intercept is zero
- positive slope
- Straight line
The frictional force that holds an object in place is called ______ friction. - Correct
Answer-Static
The frictional force that slows an object down while in motion is called ______ friction. -
Correct Answer-Kinetic
If the force applied on an object is greater than the force of kinetic friction the object will
travel with ________ velocity. - Correct Answer-Increasing