Answer:
The speed is 20.70 mph.
Explanation:
Given that,
Speed = 6.7 m/s = 15 mph
![1\ m/s = \dfrac{15}{6.7}](https://tex.z-dn.net/?f=1%5C%20m%2Fs%20%3D%20%5Cdfrac%7B15%7D%7B6.7%7D)
![1 m/s =2.24\ mph](https://tex.z-dn.net/?f=1%20m%2Fs%20%3D2.24%5C%20mph)
In 10.4 m/s,
![10.4\ m/s=2.24\times10.4\ mph](https://tex.z-dn.net/?f=10.4%5C%20m%2Fs%3D2.24%5Ctimes10.4%5C%20mph)
![10.4\ m/s=23.3\ mph](https://tex.z-dn.net/?f=10.4%5C%20m%2Fs%3D23.3%5C%20mph)
If 100 m record in 10.82 sec
We need to calculate the speed
Using formula of speed
![v = \dfrac{d}{t}](https://tex.z-dn.net/?f=v%20%3D%20%5Cdfrac%7Bd%7D%7Bt%7D)
Put the value into the formula
![v=\dfrac{100}{10.82}](https://tex.z-dn.net/?f=v%3D%5Cdfrac%7B100%7D%7B10.82%7D)
![v=9.242\ m/s](https://tex.z-dn.net/?f=v%3D9.242%5C%20m%2Fs)
![v=9.242\times2.24\ mph](https://tex.z-dn.net/?f=v%3D9.242%5Ctimes2.24%5C%20mph)
![v=20.70\ mph](https://tex.z-dn.net/?f=v%3D20.70%5C%20mph)
Hence, The speed is 20.70 mph.
We can divide into:
b. renewable and nonrenewable
Answer:
For example, speed is a length divided by time. Force is mass times acceleration, and is therefore a mass times a distance divided by the square of a time. We therefore say that [Force] = MLT−2.
Thrust - Friction = mass * acceleration
Friction = coefficient * mass * gravity
Friction = 0.10 * 75 * 9.8 = 73.5 N
Substituting:
200N - 73.5 = 75a
a = 1.69 m/s^2
Obtaining final velocity at the end of 41 seconds:
Vf = at
Vf = 1.69 (41)
Vf = 69.15 m/s
Using the formula for displacement for linear motion problems:
s = Vo*t + (1/2)a*t^2
s = 0 + (1/2)(1.69)(41^2)
s = 1420.445 meters
After he runs out of fuel, we use the following formula to find the distance that he coasts:
F = ma = coefficient*m*g
a = 0.10(9.8)
a = -0.98
Vf^2 = Vo^2 + 2as
0 = 69.15^2 + 2(-0.98)s
s = 2439. 65
Adding the 2 displacements together to obtain the total distance:
Total distance = 2439.65 + <span>1420.45 meters
Total distance = 3860.1 meters</span>
Work can be represented by Wd (Work done) or Ew (Energy, work). Since it is a form of energy, it is measured in joules