# PSC 2121 Lecture Notes - Lecture 2: Net Force, Density, Calorie

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27 Apr 2016
School
Course
PHYSICAL SCIENCE PSC2121
Review Final Exam
1. In the SI, m is the symbol for
A) mass.
B) meter.
C) mole.
D) metric.
2. Which of the following is a unit of mass density?
A) kg/m
B) g/cm
C) lb/ft
3
2
D) lb/ft2
3. Distance covered per unit of time is called
A) speed.
B) acceleration.
C) velocity.
D) displacement.
4. Which of the following is a possible unit of acceleration?
A) m/s
B) m s
C) m
2
2/s
D) m/s
5. A freely falling object
A) has a uniformly increasing velocity.
B) is unaffected by gravity.
C) has a uniformly increasing acceleration.
D) has a uniformly increasing displacement.
6. Two equal and opposite forces of 3.0 N act on an object. The net force on the
object is
A) 3.0 N.
B) 0 N.
C) 5 N.
D) 6 N.
E) cannot be determined from given information.
7. A constant net force acting on an object that is free to move will produce a
constant
A) speed.
B) velocity.
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PHYSICAL SCIENCE PSC2121
C) displacement.
D) acceleration.
E) distance.
8. If an object of mass 10 kg has an acceleration of 4 m/s , what is the unbalanced
2
force acting on it?
A) 40 N
B) 1.6 N
C) 0.63 N
D) 13 N
9. If a person weighs 150 lb on Earth, that person's weight on the Moon would be
A) 112. 79 N.
B) 1500 N.
C) 240 N.
D) 186 N.
E) 93 N
10. If an object of mass 8 kg has an acceleration of 5 m/s , what is the unbalanced
2
force acting on it?
A. 40 N
B. 1.6 N
C. 0.63 N
D. 13 N
E. cannot be determined
11. What is the speed of the object in problem 10 after 4 s?
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