A boat can travel 2.30 m/s in still water. If the boat points its prow directly across a stream whose current is 1.80 m/s , what
1 answer:
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Answer: 2.61 s
Explanation:
We are given the following data:
is the initial height of the object
is the initial height of the object
In addition, the motion of the object is given by:
(1)
Where:
is the final height of the object
is the time the object is in the air before hitting the ground
Rewritting (1) with the given data:
(2)
Solving the quadratic equation with the quadratic formula , where
,
,
and choosing the positive value of time:
(3)
(4) This is the time
Answer:
True.
Explanation:
- Applying the definition of average velocity, we know that we can always write the following expression:
(1)
- By definition, Δx is just the displacement, and Δt is the time interval.
- So, just rearranging terms in (1), we get: