Explain two ways that technology has had a positive impact on the environment and two ways that it has had a negative impact on
2 answers:
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Answers:
a)
b)
c)
Explanation:
A unit vector is a vector whose magnitude (length) is equal to 1. This kind of vector is identified as and the way to calculate is as follows:
Where:
is the vector
is the magnitude of the vector
Having this information clarified, let's begin with the answers:
a) Force Vector
Magnitude of :
<u />
<u>Unit vector:</u>
b) Displacement Vector
Magnitude of :
<u />
<u>Unit vector:</u>
c) Velocity Vector
Magnitude of :
<u />
<u>Unit vector:</u>
Answer:
60 km/h
Explanation:
In the first part of the trip, the speed is
v = 80 km/h
while the time interval is
t = 3 h
So, the distance covered is:
d = vt = (80)(3)= 240 km
The problem states that this distance is half distance between home and the destination - so, the total distance between home and the destination is
The time taken to cover the second part of the trip is 5 h, so the total time taken is
T = 3 h + 5 h = 8 h
Therefore, the average velocity for the entire trip is