Assignment Multiple Choice Question and Answer Physics

Multiple Choice –
Highlight the correct answer in yellow. (2 points each)
1. The weight of a 60-kg person is
A. 6.1 N.
B. 60 N.
C. 69.8 N.
D. 588 N.
2. A 3000-kg truck accelerates from 10 m/s to 30 m/s in 8 s. The net force on the
truck is
A. 765 N.
B. 7500 N.
C. 11,250 N.
D. 15,000 N.
3. The braking force needed to bring a 4000-kg truck to a stop from a speed of 20
m/s in 5 s is
A. 1000 N.
B. 1633 N.
C. 9800 N.
D. 16,000 N.
4. The weight of an object
A. is the same everywhere in the universe.
B. depends only upon its mass.
C. depends only upon the acceleration of gravity.
D. depends upon both its mass and the acceleration of gravity.
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5. According to Newton's third law of motion,
A. there is no such thing as a single force acting on an object.
B. for every force there is an equal and opposite reaction force, but each acts on a
different object.
C. action and reaction forces need not be equal, but must act in opposite directions.
D. action and reaction forces must be equal, but need not act in opposite directions
6. Angular momentum is conserved in the absence of which of the following?
A. a net torque B. linear momentum C. gravity D. inertia
7. A net force _________.
A. can produce motion B. is a scalar quantity C. is capable of producing a
change in velocity
D. both (a) and (c)
8. When a toy floats in a swimming pool, the buoyant force exerted on the toy depends
on the volume of ________?
A. water in the pool
B. the pool
C. the water displaced
D. the toy under water
9. What is necessary for a change in velocity?
A. an unbalanced force
B. inertia
C. a change in direction
D. a zero-net force
10. Which of the following units represent angular momentum?
A. kg ∙ m/s B. kg ∙ m/s2 C. N ∙ kg D. kg ∙ m2 /s2
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Decide whether each statement is true or false. (2 points each)
____False______ 11. A force always produces motion.
____True______ 12. Galileo concluded that objects could not remain in motion without
a net
force.
_____True_____ 13. The coefficient of static friction is greater than the coefficient of
kinetic
friction.
____False______ 14. It takes less force to get an object moving than it does to keep it
moving.
____True______ 15. In a free space with negligible gravity an object would travel
indefinitely.
Fill in the Blank (2 points
each)
16. An object will be in __afloat____________ at any submerged depth in a fluid if the
average density of the object and the density of the fluid are ___equal_______.
17. The newton unit of force is equal to ___kgm/s^2_________ in standard units.
18. The angular momentum of an object is not conserved if the object is acted upon by
unbalanced ______force_________.
19. ________Friction__ __________ occurs when there is relative sliding motion
between the surfaces in contact.
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