Answer: Change in velocity: -10 m/s, acceleration=-2.5m/s
Explanation:
The question in english is written below:
The end of a robotic arm moves to the right at 8m s. Four seconds later it moves to the left at 2m/s. What is its change in velocity and what is its change in acceleration?
We have the following data:
Initial Velocity of the robotic arm:
(to the right)
Final Velocity of the robotic arm:
(to the left)
Variation in time:
Firstly we have to calculate the change in velocity
, which is given by the following equation:
This means the resultant velocity is to the left
Now, we can find the acceleration
, given by:
![a=\frac{\Delta V}{\Delta t}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7B%5CDelta%20V%7D%7B%5CDelta%20t%7D)
![a=\frac{-10 m/s}{4 s}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7B-10%20m%2Fs%7D%7B4%20s%7D)
This means the acceleration is also to the left, however its magnitude is always positive: ![2.5 m/s^{2}](https://tex.z-dn.net/?f=2.5%20m%2Fs%5E%7B2%7D)
Answer:
The answer is a. Jumper
Explanation:
The change in the momentum is represented by the equation
![Ft=m*v](https://tex.z-dn.net/?f=Ft%3Dm%2Av)
Acceleration of any body is calculated by the product of the mass of the body and with the velocity the same mass is moving.
Since it is mentioned in the statement that m is the mass of the jumper then velocity will also be of the jumper to calculate the change in the momentum.
If the mass of bugle cord is taken, then its velocity will be taken for the equation.
Answer: True
Explanation:
Class characteristics can be define as the features which are common to the group of objects. Like the make, model, label of the manufacturing company, design, shape and form. The individual characteristics can be define as the features which develop on the object or any other article with it's wear and use. Like tear, cuts, malformation and deposition of dust, dirt, and mud. The individual characteristic indicate towards the ownership of article or evidence to a particular person.
The class characteristics can only support the possibility of the evidence exactly alike that of the evidence found at the scene of crime. But the individual characteristics can directly link the evidence with the cause of crime. Hence, will be useful to prove that a crime has taken place in the court of law.