PES 1110 General Physics I
Practice Exam 1
Definitions
1. (3 pts) Acceleration is a direct change
in:
A. Magnitude of the velocity
B. Direction of the position
C. Direction of the velocity
D. All of the above
E. Only A and C
F. Only B and C
2. (3 pts) Which SI unit measures weight?
A. The kilogram
B. The pound
C. The newton
D. The erg
Concepts
3. (3 pts) A block rests on an inclined plane. Which of the free-body diagrams below
represents this block?
A.
B.
Weight
Weight
Normal Force
Normal Force
C.
Normal Force
Friction
Friction
D.
Weight
Friction
Normal Force
Weight
Friction
4. (3 pts) Which of the following does not depend on the reference frame of the observer?
A. Mass
B. Velocity
C. Position
D. Acceleration
Applications
5. (3 pts) How fast is an object accelerating in SI units if it is accelerating 40 micrometers per
millisecond per millisecond? (micro=10-6, milli=10-3)?
6.
R. Gist
(4 pts) An elevator initially traveling downward at 10 m/s begins to decelerate at a constant
rate of 1 m/s2. How long does it take the elevator to stop?
1 of 2
Long semester, Ver B, Rev. 1
PES 1110 General Physics I
Practice Exam 1
7. (5 pts) You throw a ball upward against a brick wall with a speed of 20 m/s at an initial angle
of 60o above horizontal. If you are standing 8 m from the base of the wall, how high above the
point you release the ball does the ball hit the wall?
8. (5 pts) A girl swims 2 m/s in still water. She wishes to cross a river of width 100 m flowing
downstream at 1 m/s. She aims at a point 30o upstream and begins to swim. How long does it
take her to swim across?
9. (5 pts) What is the horizontal range of a cannon whose muzzle velocity is 340 m/s and is fired
at a 35o angle above horizontal? (ignore air resistance)

10. (4 pts) What magnitude of acceleration will a force of F  (10iˆ  24 ˆj ) N give to man sitting
in a rolling chair? The combined mass of man and chair is 78 kg. (Ignore any friction)
11. (3 pts) A 60 kg woman stands on a metric scale in an elevator. As the elevator accelerates
downward at a constant rate, she notes that the scale reads 400 N. What is the acceleration of
the elevator?
12. (5 pts) Find the magnitude of the displacement between the following Cartesian vectors:
Position 1 (given by the Cartesian vector <12, -5, 0> m)
Position 2 (given by the Cartesian vector <2, 2, 1> m).
13. (6 pts) Three ropes are attached to a tree and are pulled in different directions. The first force
is of magnitude 1000 N in the direction -3/5 iˆ + 4/5 ĵ . The second force is given by (320 iˆ +
1240 ĵ ) N. The third force has magnitude of 600 N, is in the x-y plane and directed 30
degrees below the positive x-axis. What is the resulting force vector on the tree?
14. (3 pts) An astronaut weights 883 Newtons when on the surface of the Earth (g=9.81 m/s2). On
the surface of the Moon, he weighs 148.5 Newtons. What is the gravitational acceleration on
the Moon?
R. Gist
2 of 2
Long semester, Ver B, Rev. 1