The acceleration is defined as the ratio between the change in speed and the change in time (i.e. the time elapsed to perform the speed change).
In this case, the reference to the "starting block" hints that the initial speed is 0, and the final speed is 8 m/s. This means that the change in speed is 8-0=8 m/s.
We are given that this change in speed takes place in 4 seconds.
So, the acceleration is the ratio between the change in speed and the time elapsed: 8/4=2m/s^2
Answer:
The meaning of star system is "A small number of stars." I think it's either A) a group of hundreds of stars, or B) a group of two or more stars.
Explanation:
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Answer: liquid
Explanation: a liquid has a volume that does not change (unless you add more or less liquid to it, obviously) but its shape can change depending on the container you use.
Think, if you put a liter of water into a bucket, it will still be a liter of water if you pour it into a water bottle. The only thing different is that the shape of the liquid changes.