A horse began running due east and covered 25 km in 4.0 hr. What is the average velocity of the horse?
2 answers:
Answer:
B) due east
Explanation:
Conceptual analysis
The average speed (v) is defined as the relationship between the displacement (d) that a body made and the total time (t) it took to perform it and is calculated by the following formula:
Formula (1)
v: velocity in m/s
d: Displacement (m)
t: Time (s)
Known data
We know the following data
d = 25 km
t = 4.0 hr
Problem development
We replace data in formula (1):
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Answer:
The velocity will be "76.8 m/s".
Explanation:
The given values are:
Acceleration,
a = 2.4 m/s²
Time,
t = 32 seconds
By equation of motion,
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On substituting the values, we get
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⇒
⇒
Answer:
The appropriate response is "". A further explanation is described below.
Explanation:
The torque () produced by the force on the dam will be:
⇒
On applying integration both sides, we get
⇒
⇒
⇒
⇒