Chapter 3 Multiple Choice Quiz 2

Please answer all questions


1	The law of inertia is another name for Newton's
		A)	first law of motion.
		B)	second law of motion.
		C)	third law of motion.
		D)	None of the above are correct.


2	The extent of resistance to a change of motion is determined by an object's
		A)	weight.
		B)	mass.
		C)	density.
		D)	All of the above are correct.


3	Mass is
		A)	a measure of inertia.
		B)	a measure of how difficult it is to stop a moving object.
		C)	a measure of how difficult it is to change the direction of travel of a moving object.
		D)	All of the above are correct.


4	A change in the state of motion is evidence of
		A)	a force.
		B)	an unbalanced force.
		C)	a force that has been worn out after an earlier application.
		D)	Any of the above are correct.


5	Considering the forces on the system of you and a bicycle as you pedal the bike at a constant velocity in a horizontal straight line,
		A)	the force you are exerting on the pedal is greater than the resisting forces.
		B)	all forces are in balance, with the net force equal to zero.
		C)	the resisting forces of air and tire friction are less than the force you are exerting.
		D)	the resisting forces are greater than the force you are exerting.


6	If you double the unbalanced force on an object of a given mass, the acceleration will be
		A)	doubled.
		B)	increased fourfold.
		C)	increased by one-half.
		D)	increased by one-fourth.


7	If you double the mass of a cart while it is undergoing a constant unbalanced force, the acceleration will be
		A)	doubled.
		B)	increased fourfold.
		C)	half as much.
		D)	one-fourth as much.


8	The acceleration of any object depends on
		A)	only the net force acting on the object.
		B)	only the mass of the object.
		C)	both the net force acting on the object and the mass of the object.
		D)	neither the net force acting on the object nor the mass of the object.


9	Which of the following is a measure of mass?
		A)	pound
		B)	newton
		C)	kilogram
		D)	All of the above are correct.


10	Which of the following is a correct unit for a measure of weight?
		A)	kilogram
		B)	newton
		C)	kg · m/s
		D)	None of the above are correct.


11	From the equation of F 5 ma, you know that m is equal to
		A)	a/F
		B)	Fa
		C)	F/a
		D)	F - a


12	A newton of force has what combination of units?
		A)	kg · m/s
		B)	kg/m²
		C)	kg/m²/s²
		D)	kg · m/s²


13	Which of the following is not a unit or combination of units for a downward force?
		A)	lb
		B)	kg
		C)	N
		D)	kg · m/s²


14	Which of the following is a unit for a measure of resistance to a change of motion?
		A)	lb
		B)	kg
		C)	N
		D)	All of the above are correct.


15	Which of the following represents mass in the English system of measurement?
		A)	lb
		B)	lb/ft/s²
		C)	kg
		D)	None of the above are correct.


16	The force that accelerates a car over a road comes from
		A)	the engine.
		B)	the tires.
		C)	the road.
		D)	All of the above are correct.


17	Ignoring all external forces, the momentum of the exhaust gases from a flying jet airplane that was initially at rest is
		A)	much less than the momentum of the airplane.
		B)	equal to the momentum of the airplane.
		C)	somewhat greater than the momentum of the airplane.
		D)	greater than the momentum of the airplane when the aircraft is accelerating.


18	Doubling the distance between the center of an orbiting satellite and the center of the earth will result in what change in the gravitational attraction of the earth for the satellite?
		A)	one-half as much
		B)	one-fourth as much
		C)	twice as much
		D)	four times as much


19	If a ball swinging in a circle on a string is moved twice as fast, the force on the string will be
		A)	twice as great.
		B)	four times as great.
		C)	one-half as much.
		D)	one-fourth as much.


20	A ball is swinging in a circle on a string when the string length is doubled. At the same velocity, the force on the string will be
		A)	twice as great.
		B)	four times as great.
		C)	one-half as much.
		D)	one-fourth as much.

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