Directions: Write TRUE is the statement is correct but if it is false, change the underlined words with the orrect answer. 1. A force is a push or pull 2. Force is a galar quantity 3. The unit of force is Newton (N) 4. In general, a body can have several forces acting on it at the same time 5. Inertial frame of reference are reference frame where Newton's First law are dbservable. 6. Another effect of a balanced force, equilibrium, is that a body accelerates. 7. The heavier the object, the lesser the inertia. 8. Forces acting on a body are unbalanced if the resultant force is not zero 9. In an inertial reference frame, No forces should be exerted within the frame. 10. Normal force is lateral in nature.

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Chapter1: Units, Trigonometry. And Vectors
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Directions: Write TRUE is the statement is correct but if it is false, change the underlined words with the
correct answer.
1. A force is a push or pull
2. Force is a galar quantity
3. The unit of force is Newton (N)
4. In general, a body can have several forces acting on it at the same time
5. Inertial frame of reference are reference frame where Newton's First law are observable.
6. Another effect of a balanced force, equilibrium, is that a body accelerates.
7. The heavier the object, the lesser the inertia.
8. Forces acting on a body are unbalanced if the resultant force is not zero
9. In an inertial reference frame, No forces should be exerted within the frame.
10. Normal force is lateral in nature.
П.
Identify Action Reaction Pairs
A student in hot air balloon ascends vertically at a constant speed. Consider the four forces in this
situation:
Fl= the weight of the baloon
F2= the weight of the student
F3= the force of the student pulling on the earth
F4= the support force of the hot air balloon on the student
11. Which of the two forces form an "action-reaction" pair that obeys Newton's third law?
a. Fl and F2
b. F2 and F3 c. F2 and F4 d. Fl and F3
12. Is the hot air balloon can be considered as an inertial reference frame?
a. Yes, because the hot air balloon ascends at a constant speed
b. No, because the hot air balloon does not accelerate
c. More information needed.
A book is resting on the surface of a table. Consider the four forces in this situation:
Fl=the force of the earth pulling on the book
F2=the force of the table pushing on the book
F3=the force of the book pushing on the table
F4=the force of the book pulling on the earth
13. Which of the two forces form an "action-reaction" pair that obeys Newton's third law?
a. Fl and F2
b. F2 and F3 c. F2 and F4 d. Fl and F3
14. A 60 kg astronaut pushes to the left on a 1.0x104 kg - massive spacecraft with force F in a
"gravity-free" space. During the push, the astronaut accelerates to the right. Which of the
following statement is true?
a. The spacecraft does not move, but the astranaut moves to the right with a constant speed.
b. The astronaut stops moving after he stops pushing on the spacecraft
c. The force exerted on the spacecraft is larger than the force exerted by the astronaut
d. The force exerted on the astronaut is larger than the force exerted by the spacecraft
e. The velocity of the astronaut increases while he is pushing on the spacecraft.
Transcribed Image Text:Directions: Write TRUE is the statement is correct but if it is false, change the underlined words with the correct answer. 1. A force is a push or pull 2. Force is a galar quantity 3. The unit of force is Newton (N) 4. In general, a body can have several forces acting on it at the same time 5. Inertial frame of reference are reference frame where Newton's First law are observable. 6. Another effect of a balanced force, equilibrium, is that a body accelerates. 7. The heavier the object, the lesser the inertia. 8. Forces acting on a body are unbalanced if the resultant force is not zero 9. In an inertial reference frame, No forces should be exerted within the frame. 10. Normal force is lateral in nature. П. Identify Action Reaction Pairs A student in hot air balloon ascends vertically at a constant speed. Consider the four forces in this situation: Fl= the weight of the baloon F2= the weight of the student F3= the force of the student pulling on the earth F4= the support force of the hot air balloon on the student 11. Which of the two forces form an "action-reaction" pair that obeys Newton's third law? a. Fl and F2 b. F2 and F3 c. F2 and F4 d. Fl and F3 12. Is the hot air balloon can be considered as an inertial reference frame? a. Yes, because the hot air balloon ascends at a constant speed b. No, because the hot air balloon does not accelerate c. More information needed. A book is resting on the surface of a table. Consider the four forces in this situation: Fl=the force of the earth pulling on the book F2=the force of the table pushing on the book F3=the force of the book pushing on the table F4=the force of the book pulling on the earth 13. Which of the two forces form an "action-reaction" pair that obeys Newton's third law? a. Fl and F2 b. F2 and F3 c. F2 and F4 d. Fl and F3 14. A 60 kg astronaut pushes to the left on a 1.0x104 kg - massive spacecraft with force F in a "gravity-free" space. During the push, the astronaut accelerates to the right. Which of the following statement is true? a. The spacecraft does not move, but the astranaut moves to the right with a constant speed. b. The astronaut stops moving after he stops pushing on the spacecraft c. The force exerted on the spacecraft is larger than the force exerted by the astronaut d. The force exerted on the astronaut is larger than the force exerted by the spacecraft e. The velocity of the astronaut increases while he is pushing on the spacecraft.
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