Remember that the total velocity of the motion is the vector sum of the velocity you would have in still water and the stream. Always place the vectors carefully to be able to come up with an accurate sum vector.
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Two identical arrows, one with twice the speed of the other, are fired into a bale of hay. Assuming the hay exerts a constant fr
1 answer:
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Complete Question
Alberta is going to have dinner at her grandmother's house, but she is running a bit behind schedule. As she gets onto the highway, she knows that she must exit the highway within 55 min if she is not going to arrive late. Her exit is 43 mi away. How much time would it take at the posted 60 mph speed?
Answer:
The time it would take at the given speed is
Explanation:
From the question we are told that
The time taken to exist the highway is
The distance to the exist is
Alberta speed is
The time it would take travelling at the given speed is mathematically represented as
substituting values
Converting to minutes
1 hour = 60 minutes
So 0.71667 hours = x minutes
Therefore
<u>Answer:</u>
The acceleration of the plane and the time required to reach this speed is (a)= 7.5 and time(t) = 20 seconds
<u>Explanation: </u>
Given data Initial velocity = 0
Final velocity () = 150 m/second
Distance (d) = 1500 m
We have the formula,
which gives = 0+2a(1500)
22500 = 3000 a
acceleration (a) = 7.5
150 = 7.5 t
t= 150/7.5 = 20
t = 20 seconds.