The value of V is 640 km/hr.
<h3>What is Average velocity?</h3>
Average velocity is the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.
To calculate the value of V from the question, we use the formula below.
- V' = (V+U)/2............ Equation 1
Making V the subject of the equation
- V = 2V'-U.............. Equation 2
From the question,
⇒ Given:
- V' = 520 km/hr
- U = 400 km/hr
Substitute these values into equation 2
- V = (520×2)-400
- V = 640 km/hr
Hence, the value of V is 640 km/hr.
Learn more about average velocity here: brainly.com/question/4931057
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Answer:
3.7 km
62.7175453187 seconds
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration
g = Acceleration due to gravity = 9.81 m/s²
The maximum altitude of the rocket is 750+875+2038.73598369 = 3663.73598369 m = 3.7 km
Time taken to reach the ground from max height 27.3301854818 seconds
Time to reach max height during free fall after stage 2 ends is 20.3873598369 s
Total time of flight is 10+5+20.3873598369+27.3301854818 = 62.7175453187 seconds
10,000 meters: 1,000 meters in every kilometer.
Answer:
a) positive bc the surroundings are losing heat
b) positive
c) negative bc the surroundings are gaining heat
d) negative bc work is done by the system
Explanation:
Answer:
67.5
Explanation:
The plane accelerates at 2.7m/s,^2
Time is 25 seconds
The velocity can be calculated as follows
= 25×2.7
= 67.5
Hence the speed f the plane is 67.5