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8 August, 06:08

Which of the following statements are true? a. Kinematics is the science that studies forces and motion of particles and bodies. b. Speed is a vector quantity. c. The units of velocity are length divided by time. d. The term deceleration is commonly used to describe a negative acceleration.

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  1. 8 August, 09:35
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    true. b, c and d

    Explanation:

    Let's review each statement separately

    a) False. The kinematics studies the position, speed and acceleration of the bodies, but not what causes these changes

    b) True. Velocity is the displacement between time, displacement is a vector, and time is a scalar, so the division between them gives a vector

    c) True. speed is the displacement that is a length between time, so its unit is length / time

    d) true desaceleration = - aceleration
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