Average velocity is a vector unit (i.e. includes magnitude <em>and </em>direction) calculated by working out distance ÷ time:
80 metres ÷ 20 seconds = 4 metres/seconds (m/s)
Therefore, your final answer is C. 4 m/s south.
The correct answer to the question is D).3600 N.
CALCULATION:
As per the question, the mechanical advantage of the machine MA = 4.5.
The force applied to the machine
.
We are asked to calculate the output force of the machine .
Let the output force is denoted as
.
The mechanical advantage of a machine is defined as the force amplification of a machine by using certain mechanical devices.
Mathematically it is defined as the ratio of output force to the applied or input force.
Hence, mechanical advantage MA = ![\frac{f_{o}} {f_{i}}](https://tex.z-dn.net/?f=%5Cfrac%7Bf_%7Bo%7D%7D%20%7Bf_%7Bi%7D%7D)
Hence, the output force is calculated as -
![f_{0}=\ MA\times f_{i}](https://tex.z-dn.net/?f=f_%7B0%7D%3D%5C%20MA%5Ctimes%20f_%7Bi%7D)
![=\ 4.5\times 800 N](https://tex.z-dn.net/?f=%3D%5C%204.5%5Ctimes%20800%20N)
[ANS]
Hence, the output force is 3600 N.
The answer is as voltage increases current increases and therefore resistance would remain constant
I think it's d because it has small mass to generate enough pressure to start hydrogen fusion. Hvae a good day!