APSC 181 Dynamics Midterm 1 SOLUTIONS (ANSWER KEY ON LAST PAGE) | University of British Columbia Okanagan - Engineering

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, APSC 181 – Dynamics
Ernest Goh, PhD
January 31st, 2017
University of British Columbia Okanagan - Engineering

Part A: True / False Questions– 20 marks. Indicate your answer on the bubble sheet.

1. Dynamics is concerned with bodies that only have accelerated motion.
(A) TRUE (B) FALSE
2. Some objects can be considered as particles provided motion of the body is characterized by
motion of its mass center and any rotation of the body can be neglected.
(A) TRUE (B) FALSE
3. The distance the particle travels is a vector quantity.
(A) TRUE (B) FALSE
4. The average velocity and the average speed of a particle are different things.
(A) TRUE (B) FALSE
5. If the acceleration is zero, the particle cannot move.
(A) TRUE (B) FALSE
6. A particle can have an acceleration and yet have zero velocity.
(A) TRUE (B) FALSE
7. If � =4�3 m/s, it is necessary to know the position of the particle at a given instant in order to
determine the position of the particle at another instant.
(A) TRUE (B) FALSE
8. The normal component of acceleration represents the time rate of change in the magnitude of the
velocity.
(A) TRUE (B) FALSE
9. The tangential component of acceleration represents the time rate of change in the direction of
the velocity.
(A) TRUE (B) FALSE
10. The horizontal component of velocity remains constant during a free-flight motion.
(A) TRUE (B) FALSE




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