In an emergency braking exercise, a student driver stops a car travelling at 83 km/h [W] in a time of 4.0 s. What is the car's acceleration during this time? (The answer is expressed in units of m/s2.) 5.8 [W] 5.8 [E] 21 [E] -5.8 [E] 21 [W]

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Q: PLEASE HELP!

A: Given:

Q: v (m/s) 4 I (s) 20 5n 15 Figure 2 The velocity vs. time graph for an object moving along a straight…

A:

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A: one question at a time.

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A:

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A:

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.