Answer: 300 x 6 is your answer what’s 300 x 6? That’s it
Explanation:
Answer: Negative acceleration
Explanation:
According to the described situation we have two velocities:
-An initial velocity during the first hour: ![V_{o}=400 mi/h](https://tex.z-dn.net/?f=V_%7Bo%7D%3D400%20mi%2Fh)
-A final velocity during the last 200 miles: ![V_{f}=200 mi/h](https://tex.z-dn.net/?f=V_%7Bf%7D%3D200%20mi%2Fh)
As we can see, the final velocity is less than the initial velocity, this means the plane's velocity decreased.
On the other hand, acceleration
is defined as <u>the variation of velocity in time:</u>
Since the plane's velocity decreases, the acceleration is negative.
Hence, this situation is an example of negative acceleration.
Answer:
17.565 kgm/s
Explanation:
Momentum = mass × velocity
I = mv..................... Equation 1
But we can calculate the value of v using the equation of motion under gravity.
v² = u²+2gs............. Equation 2
Where u = initial velocity, s = maximum heigth, g = acceleration due to gravity.
Given: u = 0 m/s (at the maximum heigth), s = 7.0 m.
Constant: g = 9.8 m/s²
Substitute these values into equation 2
v² = 0²+ 2×7×9.8
v² = 137.2
v = √137.2
v = 11.71 m/s.
Also given: m = 1.50 kg
substitute these values into equation 1
Therefore,
I = 1.5×11.71
I = 17.565 kgm/s