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PHY 103 exam 1 Questions With Complete Solutions
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PHY 103 exam 1 Questions With Complete Solutions
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PHY 103 exam 1 Questions With Complete SolutionsInertia correct answer: resistance to change in motion of an
object
States of motion correct answer: rest and moving at constant
speed in a straight line
Why you need a force to change the motion of an object? correct
answer: because they have intentional. amount of inertia
depends of mass only.
Distance correct answer: meters
Displacement correct answer: meters and direction. ( far from
start)
Velocity correct answer:
Kilogram correct answer:
Force correct answer: is in newton's 1kg weighs about 1 kg on
2.2 lbs
Acceleration correct answer: rate of change of speed/ velocity
Vectors correct answer: velocity, displacement, acceleration,
force
,Free body diagram correct answer: it shows all the forces acting
on an object
If the net force of an object is 0 the acceleration will be correct
answer: zero. object will have a constant velocity
Speed correct answer: rate of change of position. m/s always
have time in the denomination
Force correct answer: push or pull
Fundamental forces of nature correct answer: magnetic, electric
forces (static), gravity, strong nuclear force holds protons
together inside an atom.
Examples of applications of newton's second law correct
answer:
Newton's 2nd law correct answer:
You use a millimeter ruler to measure the area of a piece of
paper. You calculate the area to be 123. 6544.square
centimeters. Yes, it has too many significant digits but it is also
too precise given the measurement instrument used. Please
explain what the latter statement means. correct answer:
What does it mean when you say something has inertia? Give
three examples that demonstrate the concept of inertia. correct
answer: Inertia means resistance to change in motion of an
object. Some examples that demonstrate the concept of inertia
are body movement to the side when a car makes a sharp turn or
, doing an activity such as ice skating. Second example, when a
seat belt tightens in a car when it stops quickly. Lastly, a pebble
or ball rolling down a hill will continue to roll unless friction or
another force stops it.
What determines how much mass an object has?
Why doesn't the mass of an object depend solely on its volume?
If you were in space where there is "no gravity" and I placed in
your hands objects of equal volume but different mass, how
would you determine which mass was greater? correct answer:
The amount of matter or material of an object determines how
much mass it has. The mass of an object doesn't depend solely
on its volume because the material of an object is made from
determines its mass. For example, an object that is made up of a
denser
Material will have more mass than an object of a lighter material
like such as the example in the video. A Styrofoam block can be
larger than a lead block but the material the Styrofoam is
composed of is lighter material than the lead block giving the
lead block more mass. If I was in a space where there is no
gravity and I placed my hands objects of equal volume but
different mas, I would determine which mass is greater by first
determining which object was made of a denser material. I
would have to know how much force is needed to initiate
motion in the object. The mass of an object remains the same in
zero gravity and it's inertia as well. The object with more mass
requires more energy to initiate movement.
Conceptual physics the old tablecloth trick
Describe what happened.
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