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STRAIGHTERLINE PHYSICS EXAM 1 CHAPTERS 1-4
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STRAIGHTERLINE PHYSICS EXAM 1 CHAPTERS 1-4
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STRAIGHTERLINE PHYSICS EXAM 1 CHAPTERS 1-4velocity - Answers-whenever a net force acts on an object there is a change in the
objects
opposite to the direction of sliding - Answers-the direction of the force of friction on a
sliding crate is
the newton - Answers-the unit of mass is the kilogram, and unit of weight is
the net force acting on it is 0 - Answers-an object cannot remain at rest unless which of
the following holds
it could be moving to the left, right or be at rest - Answers-a block of mass 2kg is acted
upon two forces 3N left and 4N right, what can you say about the blocks motion
moving with a constant nonzero accerleration - Answers-a massive block is being pulled
along a horizontal frictionless surface by a constant horizontal force. the block must be
twice as much. - Answers-An object is propelled along a straight-line path by a force. If
the net force were doubled, the object's acceleration would be
halves - Answers-An object is propelled along a straight-line path in space by a force. If
the mass of the object somehow becomes twice as much, its acceleration
5N - Answers-An object is pulled northward by a force of 10 N and at the same time
another force of 15 N pulls it southward. The magnitude of the resultant force on the
object is
10N - Answers-The force of friction on a sliding object is 10 newtons. The applied force
needed to maintain a constant velocity is
6N - Answers-A 10-N falling object encounters 4 N of air resistance. The net force on
the object is
0N - Answers-An apple weighs 1 N. When held at rest above your head, the net force
on the apple is
1N - Answers-An apple at rest weighs 1 N. The net force on the apple when it is in free
fall is
all of these - Answers-Which has zero acceleration? An object
at rest.
in mechanical equilibrium.
moving at constant velocity.
all of these
, none of these
is zero - Answers-Whenever the net force on an object is zero, its acceleration
about 1 kg. - Answers-The mass of a pet turtle that weighs 10 N is
has zero acceleration. - Answers-An object following a straight-line path at constant
speed
400 N. - Answers-A man weighing 800 N stands at rest on two bathroom scales so that
his weight is distributed evenly over both scales. The reading on each scale is
equal to its weight. - Answers-A rock is thrown vertically into the air. At the very top of its
trajectory the net force on it is
9.8 - Answers-A rock is thrown vertically into the air. At the top of its path, its
acceleration in meters per second per second is
cannot have a magnitude equal to 5N - Answers-Two forces, of magnitude 4N and 10N,
are applied to an object. The relative direction of the forces is unknown. The net force
acting on the object __________.
heavier object. - Answers-Two objects of the same size, but unequal weights are
dropped from a tall tower. Taking air resistance into consideration, the object to hit the
ground first will be the
the light woman - Answers-A light woman and a heavy man jump from an airplane at the
same time and open their same-size parachutes at the same time. Which person will
get to a state of zero acceleration first?
10 times as much - Answers-A 10-kg brick and a 1-kg book are dropped in a vacuum.
The force of gravity on the 10-kg brick is
5N - Answers-An astronaut on another planet drops a 1-kg rock from rest and finds that
it falls a vertical distance of 2.5 meters in one second. On this planet, the rock has a
weight of
acceleration - Answers-If an object of constant mass experiences a constant net force, it
will have a constant
force - Answers-The newton is a unit of
0N - Answers-A 10-N falling object encounters 10 N of air resistance. The net force on
the object is
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