which of the following is the cause of an acceleration or change in an object's motion?
a. speed
b. inertia
c. force
d. velocity
c. force
which of the following statements does not describe force?
a. force causes objects to remain stationary
b. force causes objects to start moving
c. force causes objects to stop moving
d. force causes objects to change direction
a. force causes objects to remain stationary
which causes a moving object to change direction?
a. acceleration
b. velocity
c. inertia
d. force
d. force
which of the following forces arises from direct physical contact between two objects?
a. gravitational force
b. fundamental force
c. contact force
d. field force
c. contact force
which of the following forces is an example of contact force?
a. gravitational force
b. frictional force
c. normal force
d. tension
d. frictional force
which of the following forces is an example of a field force?
a. gravitational force
b. frictional force
c. normal force
d. tension
a. gravitational force
which of the following is the tendency of an object to maintain its state of motion?
a. acceleration
b. inertia
c. force
d. velocity
b. inertia
a car goes forward on a level road at constant velocity. the additional force needed to bring the car into equilibrium is
a. greater than the normal force times the coefficient of static friction
b. equal to the normal force times the coefficient of stati
d. zero
if a nonzero net force is acting on an object, then the object is definitely
a. at rest
b. moving with a constant velocity
c. being accelerated
d. losing mass
c. being accelerated
which statement about the acceleration of an object is correct?
a. the acceleration of an object is directly proportional to the net external force acting on the object and inversely proportional to the mass of the object
b. the acceleration of an object
a. the acceleration of an object is directly proportional to the net external force acting on the object and inversely proportional to the mass of the object
a small force acting on human sized objects causes
a. a small acceleration
b. no acceleration
c. a large acceleration
d. equilibrium
a. a small acceleration
according to newton' second law, when the same force is applied to two objects of different masses
a the object with greater mass will experience a great acceleration and the object with less mass will experience an even greater acceleration
b. the object
b. the object with greater mass will experience a smaller acceleration and the object with less mass will experience a greater acceleration
a hammer drives a nail into a piece of wood. identify an action-reaction pair, and compare the forces exerted by each object
a. the nail exerts a force on the hammer; the hammer exerts a force on the wood
b. the hammer exerts a force on the nail; the wood
c. the hammer exerts a force on the nail; the nail exerts a force on the hammer.
a hocket stick hits a puck on the ice. identify an action-reaction pair, and compare the forces exerted by each object
a. the stick exerts a force on the puck; the puck exerts a force on the stick
b. the stick exerts a force on the puck; the puck exerts a
a. the stick exerts a force on the puck; the puck exerts a force on the stick
a leaf falls from a tree and lands on the sidewalk. identify an action-reaction pair, and compare the forces exerted by each object
a. the tree exerts a force on the leaf; the sidewalk exerts a force on the leaf
b. the leaf exerts a force on the sidewalk;
b. the leaf exerts a force on the sidewalk; the sidewalk exerts a force on the leaf
a ball is dropped from a person's hand and falls to Earth.. identify an action-reaction pair, and compare the forces exerted by each object
a. the hand exerts a force on the ball; Earth exerts a force on the hand
b. Earth exerts a force on the ball; the h
d. Earth exerts a gravitational force on the ball; the ball exerts a gradational force on Earth
the statement by Newton for every action there is an equal but opposite reaction is which of his laws of motion?
a. first
b second
c. third
d. fourth
c. third
as a basketball player starts to jump for a rebound, the player begins to move upward faster and faster until his shoes leave the floor. at the moment the player begins to jump, the force of the floor on the shoes is
a. greater than the players weight
b.
a. greater than the players weight
the magnitude of the force of gravity acting on an object is
a. frictional force
b. weight
c. inertia
d. mass
b. weight
a measure of the quantity of matter is
a. density
b. weight
c. force
d. mass
d. mass
a change in the force of gravity acting on an object will affect the object's
a. mass
b. frictional force
c. weight
d. inertia
c. weight
___ and Galileo contributed most to our understanding of motion.
newton
a change in the state of motion of an object is caused by a(n) ___.
force
___ is the study of motion without regard to force.
kinematics
___ is the study of the relationships that exist between forces and the motion of objects.
dynamics
electromagnetic forces are ___ than gravitational forces.
stronger
___ is the property of an object which causes it to resist all changes in its state of motion.
inertia
unless acted upon by a(n) ___, an object at rest or in a state of uniform motion will remain at rest or in uniform motion.
external force
an object is ___ when an unbalanced force acts on it.
accelerated
a et force of one ___ gives a mass a 1 kg an acceleration of 1 m/s2
newton
acceleration of an object varies directly with the applied force an inversely with the ___ of the object.
mass
___ is the measurement of the gravitational force acting on an object
weight
___ depends upon the amount in an object and is independent of the location of the object.
mass
the ___ method of measuring mass is easier and more widely used than the inertial method.
gravitational
___ is a force that opposes the motion of an object.
friction
the force of friction depends upon the type of surfaces in contact and the ___ force.
normal
static friction is ___ than sliding friction.
greater
complete the following statement: "every force is accompanied by a(n) ___.
equal but opposite force