I think it’s D
I hope this hopes
Answer:
i don't understand the hw
If it starts at rest the initial velocity is 0.
For an acceleration, a, and time, t, the velocity is v=at. Since at t=4, v=7, then a=7/4=1.75m/s^2
The ratio between power of A and power of B is 2
Explanation:
In physics, power is defined as the ratio between the work done and the time taken to do the work:

where
P is the work done
t is the time taken
In this problem, we have:
Person A and person B do the same amount of work --> let's call this work W
Person A does this work in a time of
, so the power delivered by A is

Person B does this work in a time of
, so the power delivered by B is

So, the ratio of the powers delivered by the two persons is

Learn more about power:
brainly.com/question/7956557
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