Decrease in velocity per unit time is called:
Correct answer: C. Deceleration
- A. Acceleration
- B. Positive acceleration
- C. Deceleration
- D. Uniform acceleration
Explanation
Deceleration is the rate at which an object slows down. It is measured as the decrease in velocity per unit time, and is given by the formula: deceleration = (final velocity - initial velocity) / timewhere "final velocity" is the velocity of the object at the end of the time interval, "initial velocity" is the velocity of the object at the beginning of the time interval, and "time" is the duration of the interval.If the final velocity is less than the initial velocity, then the deceleration is negative, indicating that the object is slowing down. If the final velocity is greater than the initial velocity, then the deceleration is positive, indicating that the object is speeding up.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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