The Motion Test consists of 28 questions. Correct answers will be provided after your answers have been submitted. If they are available, possible solutions can be accessed by clicking an additional link at the bottom of the answer, which will open a problem solution screen. If you bring up such a solution screen be sure to close it by clicking the button in the upper left corner or upper right corner.

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1		A quantity of 60 km/h describes a property of motion known as
			A)	a vector.
			B)	acceleration.
			C)	velocity.
			D)	magnitude of velocity.
2		A ratio of Δv/Δt is a measure of motion that is known as
			A)	speed.
			B)	velocity.
			C)	acceleration.
			D)	mass density.
3		A ratio of Δd/Δt is a measure of motion that is known as
			A)	speed.
			B)	velocity.
			C)	acceleration.
			D)	mass density.
4		Ignoring air resistance, an object falling toward the surface of the earth has a velocity that is
			A)	constant.
			B)	increasing.
			C)	decreasing.
			D)	acquired instantaneously.
5		Ignoring air resistance, an object falling toward the surface of the earth has an acceleration that is
			A)	constant.
			B)	increasing.
			C)	decreasing.
			D)	dependent on the weight of the object.
6		A ball rolling across the floor slows to a stop because
			A)	there are unbalanced forces acting on it.
			B)	the force that started it moving wears out.
			C)	all the forces are balanced.
			D)	the net force equals zero.
7		After leaving the rifle, a bullet fired horizontally has how many forces acting on it (ignoring air resistance)?
			A)	One, from the gunpowder explosion.
			B)	One, from the pull of gravity.
			C)	Two, one from the gunpowder explosion and one from gravity.
			D)	Three, one from the gunpowder explosion, one from gravity, and one from the motion of the bullet.
8		What is a sprinter's speed if a distance of 200.0 m is covered in 21.4 s?
			A)	9.3454944 m/s
			B)	179 m/s
			C)	0.107 m/s
			D)	9.35 m/s
9		A pitcher throws a ball at 40.0 m/s and the ball is electronically timed to arrive at home plate 0.4625 s later. What is the distance from the pitcher to the home plate?
			A)	0.0116 m
			B)	18.5 m
			C)	86.485 m
			D)	86.5 m
10		What is the velocity of a car that accelerates from rest at 9.0 feet per second squared for 8.0 seconds?
			A)	1.125 ft/s
			B)	0.89 ft/s
			C)	72 ft/s
			D)	17 ft/s
11		A ball thrown straight up climbs for 3.0 seconds before falling. Neglecting air resistance, with what velocity was the ball thrown?
			A)	3.0 m/s
			B)	9.8 m/s
			C)	14.5 m/s
			D)	29 m/s
12		A car with an initial velocity of 88.0 ft/s is able to come to a stop over a distance of 100.0 ft when the brakes are applied. How much time was required for the stopping process?
			A)	1.14 s
			B)	2.27 s
			C)	4.54 s
			D)	Need more information to answer.
13		A change in the state of motion is evidence of
			A)	a force.
			B)	an applied force that is unbalanced.
			C)	a force that has been worn out after an earlier application.
			D)	any of these.
14		Considering the forces on the system of you and a bicycle as you pedal the bike at a constant velocity in a straight line
			A)	the applied force you are exerting on the pedal is greater than other forces.
			B)	all forces are in balance.
			C)	the resisting forces of friction are greater than the applied forces.
			D)	air and tire friction forces are less than the applied force.
15		The extent of resistance to a change of motion is determined by an object's
			A)	weight.
			B)	density.
			C)	mass.
			D)	any of these.
16		With all other factors equal, 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-forth.
17		With all other factors equal, If you double the mass of an object while a constant unbalanced force is applied, the acceleration will be
			A)	doubled.
			B)	increased fourfold.
			C)	one-half as much.
			D)	one-fourth as much.
18		Which of the following is a unit that can be used for a measure of weight?
			A)	kilogram
			B)	newton
			C)	kg x m/s
			D)	none of these
19		Which of the following is a unit for a measure of resistance to a change of motion?
			A)	lb
			B)	kg
			C)	N
			D)	none of the above
20		The immediate source of the force that accelerates a car over a road comes from
			A)	the engine.
			B)	the tires.
			C)	the road.
			D)	all of these.
21		Doubling the distance between an orbiting satellite and the earth will result in what change in the gravitational attraction between the two?
			A)	one-half as much
			B)	one-fourth as much
			C)	twice as much.
			D)	four times as much.
22		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.
23		What net force is needed to accelerate a 1.25 kg book 5.00 m/s2?
			A)	0.250 N
			B)	4.00 N
			C)	6.00 N
			D)	6.25 N
24		What net force does the road exert on a 70.0 kg bicycle and rider in order to give them an acceleration of 2.0 m/s2?
			A)	none.
			B)	70.0 kg
			C)	140.0 kg
			D)	140.0 N
25		A 1500 kg car accelerates uniformly from 44.0 km/hr to 80.0 km/hr in 10.0 s. What was the net force exerted on the car?
			A)	113 N
			B)	150 N
			C)	1500 N
			D)	113,400 N
26		What is the weight of a 70.0 kg person on Earth?
			A)	70.0 kg
			B)	686 N
			C)	79.8 N
			D)	7.14 N
27		A 1,000.0 kg car at rest experiences a net force of 1,000.0 N for 10.0 s. What is the final speed of the car?
			A)	10.0 m/s
			B)	100.0 m/s
			C)	1.0 m/s
			D)	100,000 m/s
28		On Earth, an astronaut and equipment weigh 1960.0 N. While weightless in space, the astronaut fires a 100 N rocket backpack for 2.0 s. What is the resulting velocity of the astronaut and equipment?
			A)	0.5 m/s
			B)	1 m/s
			C)	2 m/s
			D)	Weightless means this will not work.