May 14, 2001

Name: _____________________________

Course ID number: _____________________

I can no longer post exam results by SSN. Therefore, please tear off
this cover sheet and hand it in with your NAME and a 4-digit course
ID number that you can remember. I will post all results by this
course ID number.

Enter all your answers in the "scantron sheet" or the "bubble
sheet". Turn in only that sheet and this cover sheet. Anything you
write on this exam will not be seen or used or considered or graded.
Be sure your name and Course ID number are on the "bubble sheet" you
hand in. Be sure your name and Course ID number are bubbled-in. Be
sure your answers are recorded correctly.

For every question, also consider the following as a possible
answer:

**e)** none of the above

Possibly useful information:

v = ^{Dx }/ _{Dt}

a = ^{Dv} / _{Dt}

v = v_{i} + a t

x = x_{i }+ v_{i} t + (^{1}/_{2}) a
t^{2}

v = r w

F = m a

F_{12} = &endash; F_{21}

w = mg

g = 9.8 m/s^{2} Å 10 m/s^{2}

Statistics:High: 100Mean: 78

Low: 50

For every question, also consider the following as a possible
answer:

**e)** none of the above

1. Kinematics is a description of motion. Motion was first well
understood

**a) by Galileo in Italy during the
Renaissance.**

b) by Aristotle and the ancient Greeks during the Golden Age.

c) by Ptolemy in Egypt during the Ramses Dynasty.

d) by Newton during the Industrial Revolution.

2. Galileo was given a lifetime pension by the “city
fathers” of Venice because he introduced

a) the pendulum clock.

**b) the telescope.**
Galileo was also the first to use a telescope
in Astronomy.

c) the water clock.

d) the sextant.

3. Galileo took a position at the University and taught

**a) Euclid’s geometry.**

b) Newton’s differential calculus.

c) von Liebnitz’ integral calculus.

d) Rubick’s cubism.

4. **Velocity** is the time rate of change of

a) acceleration.

**b) displacement**.

c) speed.

d) momentum.

5. **Acceleration** is the time rate of change of

**a) velocity.**

b) displacement.

c) distance.

d) momentum.

6. **Acceleration** might be described as telling

a) where an object is located relative to an origin or reference
point.

b) how fast something is moving.

c) how long an object has been moving.

**d) how fast something is getting
faster.**

7. What is the average speed of a car that travels 360 km in
4 h?

a) 1440 km/h

b) 120 km/h

c) 110 km/h

**d) 90 km/h; v = 360 km / 4 h = 90
km/h**

8. Consider a car that starts at rest (v_{i} = 0) and
accelerates at 3 m/s^{2} for 4 seconds.

At that time, t = 4 s, how __fast__ is it
going?

a) 18 m/s

**b) 12 m/s; v = a t = (3 m/s ^{2})(4
s) = 12 m/s**

c) 9 m/s

d) 6 m/s

9. Consider a car that starts at rest (v

At that time, t = 4 s, how

a) 48 m

c) 12 m

d) 6 m

10. Consider a train that has an acceleration of 2 m/s

a) 65 m/s

c) 30 m/s

d) 25 m/s

11. Consider a ball that is thrown upward at the edge of a canyon with an initial velocity of 20 m/s. Three seconds later, what is its velocity?

a) 30 m/s

b) 15 m/s

c) - 5 m/s

12. Consider a ball that is thrown straight upward at the edge of a canyon with an initial velocity of 20 m/s. Three seconds later, where is it located? Take its initial position, at the edge of the canyon, to be the origin; that is, y

a) 30 m

c) - 10 m

d) - 20 m

13. A rock climber dislodges a rock and notices that it falls for 5 seconds before hitting the canyon floor below. How

a) 10 m/s

b) 15 m/s

c) 25 m/s

14. A rock climber dislodges a rock and notices that it falls for 5 seconds before hitting the canyon floor below. How far has it fallen when it strikes the canyon floor?

a) 10 m

b) 60 m

d) 250 m

15. **Projectile motion** is a combination of

a) horizontal motion with constant, non-zero acceleration and
vertical motion with constant velocity

b) horizontal motion with constant non-zero acceleration and vertical
motion with constant, non-zero acceleration

**c) horizontal motion with constant velocity
and vertical motion with constant, non-zero acceleration**

d) horizontal motion with constant velocity and vertical
motion with constant velocity

16. Consider a ball that is thrown horizontally from the edge of a building with an initial velocity of 20 m/s. The ball is thrown is 5 m above the driveway below. How far from the building does the ball strike the driveway?

a) 5 m

b) 10 m

c) 15 m

**d) 20 m**

17. Consider a ball thrown from a level surface with an initial
upward velocity of 20 m/s and an initial horizontal velocity of
7 m/s. **How** **long** is the ball in the air?

a) 1.0 s

b) 2.0 s

**c) 4.0 s**

d) 8.0 s

18. Consider a ball thrown from a level surface with an initial
upward velocity of 20 m/s and an initial horizontal velocity of 7
m/s. Where does it land? That is, measured from its initial position,
where does it come back to and strike the level surface?

a) 7 m

b) 14 m

**c) 28 m**

d) 56 m

19. Consider two children on a playground merry-go-round. One is near
the center and one is near the edge. The child near the edge

a) requires more time to make one revolution than

b) travels slower than

c) requires less time to make one revolution than

**d) makes one revolution in the same time as
**

the child near the center.

20. If a Ferris wheel has a radius of 10 m and requires 20 seconds to
make a revolution, what is the linear speed of a passenger? C = 2 "
r; " = 3.14

a) 1.57 m/s

**b) 3.14 m/s**

c) 6.28 m/s

d) 9.80 m/s

21. Newton's First Law of Motion states that, in the absence of a net
force, an object in motion will

a) eventually come to rest

b) continue in motion but slow down until it stops

**c) continue in motion with the same speed
along the same straight line**

d) continue along the same straight line with a decrease in
speed

22. Newton's Second Law of Motion explains the cause of motion and
may be stated as

a) "All motion is relative."

b) "All objects fall with the same velocity."

**c) "The acceleration of an object is
proportional to the net force on the object and inversley
proportional to the object's mass."**

d) "The acceleration of an object is proportional to the product of
the object's mass and the net force on it."

23. Newton's Second Law of Motion explains the cause of motion and
may be stated as

a) The net force on an object is inversely proportional to its
weight.

b) The net force on an object produces an acceleration that is
proportional to the time of action of that force.

**c) The net force on an object is equal to
the product of the mass of that object and its
acceleration.**

d) The net force on an object is inversely proportional to the mass
of the object.

24. Mass is a measure of

a) the volume of an object.

b) the size of an object.

**c) how difficult it is to change the motion
of an object.**

d) the acceleration of an object.

25. The weight of an object is

a) another name for the mass of an object.

b) the sum of all the forces on an object.

**c) the force of gravity on an
object.**

d) always greater than the mass, even in a vacuum.

26. The net force on a 10-kg object, **at rest**, is

a) 98 N

b) 49 N

c) 10 N

**d) zero**

27. The weight of a 10-kg object is

**a) 98 N**

b) 49 N

c) 10 N

d) zero

28. Harry the Painter has a weight of 500 N. When he is suspended
as shown in the sketch here, what is the tension in the rope?

a) 1000 N

**b) 500 N**

c) 250 N

d) 25 N

29. A force of 32 N acts on an object whose mass is 8 kg.

This causes the object to accelerate at

a) 2 m/s^{2}

b) 3 m/s^{2}

**c) 4 m/s ^{2}**

d) 6 m/s

30. A car, with mass of 1,000 kg, accelerates at 2 m/s

The net force exerted on the car must be

a) 250 N

b) 1,000 N

c) 1,500 N

31. The weight of a 1,000-kg car is

a) 500 N

b) 1,000 N

c) 2,000 N

32. What is the mass of a fireman whose weight is 1,000 N?

a) 10 kg

b) 25 kg

d) 1,000 kg

33. A fireman, whose weight is 1,000 N, slides down a pole with an
acceleration of 2 m/s^{2}. The forces that act on him are his
weight pulling him down and the force of friction pulling up on him
to slow him down. The force of friction must be

a) 250 N

b) 750 N

**c) 800 N**

d) 1,200 N

34. Suppose you are driving along in an open car and throw a ball
straight up into the air. While the ball is still in the air you step
down on the accelerator. Where does the ball land relative to the
car?

**a) behind the car**

b) back into the car

c) in front of the car

35. If a sailor drops a wrench from the top of a tall mast on a
moving ship, it will fall and hit the deck

a) in front of the base of the mast.

**b) at the base of the mast.**

c) behind the base of the mast.

36. Sir Isaac Newton

a) first discovered the Law of Falling Bodies while at the University
of Pisa.

b) was a close friend of Liebnitz and encouraged his early
development of calculus.

**c) made great advances in Mechanics,
Gravity, Optics, and Mathematics.**

d) used water clocks of his own invention to aid sailors in
determining their longitude.

37. Galileo

a) may be called the Father of Modern Optics.

b) wrote his findings in common Italian while at the University of
Paducah.

**c) may be called the Father of Modern
Science.**

d) wrote his findings about Gravity and discovered
calculus.

38. The hallmark of Modern Science is that

a) theories are accepted or rejected based upon the background or
reputation of the scientists who propose them.

**b) predictions of theories must be tested by
and agree with experimental results.**

c) theories must have elegant mathematical equations.

d) predictions of theories must not contradict established authorities (such as Plato or Pythagores).

39. When an object moves in a circle, Newton's Second Law of
Motion, F = ma, says that object must have a **net force** on
it

a) only if its speed is changing.

b) directed toward its forward motion.

c) in the upward direction.

**d) directed toward the center of the
circle.**

40. What value will the spring scale read in the system shown
here?

a) zero

b) 50 N

**c) 100 N**

d) 200 N

41. In the sketch here, what value will the scale read if the
little girl’s weight is **250 newtons**.

a) zero

**b) 125 N**

c) 250 N

d) 500 N

42. The four fundamental forces are

a) gravity, “contact”, electricity, and atomic

b) gravity, static friction, kinetic (sliding) friction, and air
resistance

c) gravity, strong electric, weak electric, and atomic

**d) gravity, electromagnetic, strong nuclear,
and weak nuclear**

43. “Projectile motion” describes the two-dimensional
motion of an object under the influence of gravity. The path that
such an object takes is known as

a) an ellipse.

b) a hyperbola.

**c) a parabola.**

d) a semi-circle.

44. A moving object on which no forces are acting will continue to
move with constant

a) acceleration (the Law of Falling Bodies).

**b) velocity (the Law of
Inertia).**

c) centriptel acceleration (the Law of Uniform Circular Motion).

d) displacement (the Law of Linear Motion).

45. Sir Isaac Newton and Baron Gottfried Wilhelm von Liebnetz had a
controversy over which of them had discovered or invented

a) Rubick’s Cube.

b) Euclid’s Geometry.

**c) calculus.**

d) algebra.

46. Galileo first understood motion and the ideas behind the Law of
Inertia. This put him in conflict with ideas of

a) Baron Gottfried Wilhelm von Liebnetz.

**b) Aristotle and Plato.**

c) Johannes Kepler.

d) Copernicus and Brahe.

47. A stone is dropped (from rest) from a bridge, high above a river.
The stone takes **eight** seconds before it hits the river. How
fast is it going when it hits the water?

a) 10 m/s

b) 40 m/s

**c) 80 m/s**

d) 120 m/s

48. A stone is dropped (from rest) from a bridge, high above a river. The stone takes eight seconds before it hits the river. How high is the bridge above the water?

a) 32 m

b) 64 m

c) 250 m

**d) 320 m**

49. A golf ball is given a velocity of 8 m/s horizontally and
15 m/s vertically. How __long__ is it in the air, before
coming back to its initial vertical height? That is, how long is it
in the air before striking the level ground?

a) 1.5 s

b) 2.0 s

**c) 3.0 s**

d) 4.0 s

50. A golf ball is given a velocity of 8 m/s horizontally and 15
m/s vertically. How __far__, horizontally, does it travel before
coming back to its initial vertical height? That is, how far does it
travel before hitting the level ground?

a) 8 m

b) 12 m

**c) 24 m**

d) 48 m