Answer:
Because they want attention
Part A)
Distance is given as sum of total path length
So here as we are given that car drives 40 miles East and 30 miles West
So here the total path length is
![Distance = 40 miles + 30 miles](https://tex.z-dn.net/?f=%20Distance%20%3D%2040%20miles%20%2B%2030%20miles)
![distance = 70 miles](https://tex.z-dn.net/?f=%20distance%20%3D%2070%20miles)
Part B)
Displacement is given as straight line distance between initial and final position
So here we can see that
East
West
Now the total displacement will be
![d = d_1 - d_2 = 40 - 30 = 10 miles](https://tex.z-dn.net/?f=d%20%3D%20d_1%20-%20d_2%20%3D%2040%20-%2030%20%3D%2010%20miles)
<u><em>so the displacement will be 10 miles East</em></u>
An object of mass
is moving with a uniform velocity of
. The kinetic energy possessed by the object is
.
Given:
Mass of an object ![$=10 \mathrm{~kg}$](https://tex.z-dn.net/?f=%24%3D10%20%5Cmathrm%7B~kg%7D%24)
Velocity ![$=4 \mathrm{~ms}^{-1}$](https://tex.z-dn.net/?f=%24%3D4%20%5Cmathrm%7B~ms%7D%5E%7B-1%7D%24)
Kinetic Energy
Mass of Object ![$\times(\text { Velocity })^{2}$](https://tex.z-dn.net/?f=%24%5Ctimes%28%5Ctext%20%7B%20Velocity%20%7D%29%5E%7B2%7D%24)
Kinetic Energy ![$=1 / 2 \times 10 \times 4 \times 4$](https://tex.z-dn.net/?f=%24%3D1%20%2F%202%20%5Ctimes%2010%20%5Ctimes%204%20%5Ctimes%204%24)
Kinetic Energy ![$=\underline{80 \mathbf{J}}$](https://tex.z-dn.net/?f=%24%3D%5Cunderline%7B80%20%5Cmathbf%7BJ%7D%7D%24)
What is Kinetic Energy?
- In physics, an object's kinetic energy is the energy it has as a result of its motion.
- It is defined as the amount of work required to accelerate a body of a given mass from rest to a certain velocity.
- The body retains its kinetic energy after gaining it during acceleration until its speed changes.
- Kinetic energy is present in a speeding bullet, a walking human, and electromagnetic radiation such as light. The energy associated with the continual, random bouncing of atoms or molecules is another type of kinetic energy.
Learn more about kinetic energy brainly.com/question/12669551
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Answer:
The answer to your question is a = 0.25 m/s²
Explanation:
Data
mass = m = 400 kg
Force = F = 100 N
acceleration = a = ? m/s²
Process
To solve this problem use Newton's second law that states that the force applied to an object is directly proportional to the mass of the body times its acceleration.
Formula
F = ma
solve for a
a = ![\frac{F}{m}](https://tex.z-dn.net/?f=%5Cfrac%7BF%7D%7Bm%7D)
Substitution
![a = \frac{100}{400}](https://tex.z-dn.net/?f=a%20%3D%20%5Cfrac%7B100%7D%7B400%7D)
Simplification and result
a = 0.25 m/s²
Answer:
Ek = 1705.28 [J]
Explanation:
In order to solve this problem, we must remember that kinetic energy can be calculated by means of the following equation.
![E_{k}=\frac{1}{2} *m*v^{2}](https://tex.z-dn.net/?f=E_%7Bk%7D%3D%5Cfrac%7B1%7D%7B2%7D%20%2Am%2Av%5E%7B2%7D)
where:
m = mass [kg]
v = velocity [m/s]
Ek = kinetic energy [J] (Units of Joules)
<u>For the person running</u>
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<u>For the bullet</u>
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<u />
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The difference in Kinetic energy is equal to:
Ek = 2025 - 319.72
Ek = 1705.28 [J]