B
V= f x lambda
V= 5m/s
F = 10hz
Lambda = ?
5 = 10 x lamba
5 /10 = lambda
Wavelength =0.5
Answer:
The net force acting on this object is 180.89 N.
Explanation:
Given that,
Mass = 3.00 kg
Coordinate of position of ![x= 5t^3+1](https://tex.z-dn.net/?f=x%3D%205t%5E3%2B1)
Coordinate of position of ![y=3t^2+2](https://tex.z-dn.net/?f=y%3D3t%5E2%2B2)
Time = 2.00 s
We need to calculate the acceleration
![a = \dfrac{d^2x}{dt^2}](https://tex.z-dn.net/?f=a%20%3D%20%5Cdfrac%7Bd%5E2x%7D%7Bdt%5E2%7D)
For x coordinates
![x=5t^3+1](https://tex.z-dn.net/?f=x%3D5t%5E3%2B1)
On differentiate w.r.to t
![\dfrac{dx}{dt}=15t^2+0](https://tex.z-dn.net/?f=%5Cdfrac%7Bdx%7D%7Bdt%7D%3D15t%5E2%2B0)
On differentiate again w.r.to t
![\dfrac{d^2x}{dt^2}=30t](https://tex.z-dn.net/?f=%5Cdfrac%7Bd%5E2x%7D%7Bdt%5E2%7D%3D30t)
The acceleration in x axis at 2 sec
![a = 60i](https://tex.z-dn.net/?f=a%20%3D%2060i)
For y coordinates
![y=3t^2+2](https://tex.z-dn.net/?f=y%3D3t%5E2%2B2)
On differentiate w.r.to t
![\dfrac{dy}{dt}=6t+0](https://tex.z-dn.net/?f=%5Cdfrac%7Bdy%7D%7Bdt%7D%3D6t%2B0)
On differentiate again w.r.to t
![\dfrac{d^2y}{dt^2}=6](https://tex.z-dn.net/?f=%5Cdfrac%7Bd%5E2y%7D%7Bdt%5E2%7D%3D6)
The acceleration in y axis at 2 sec
![a = 6j](https://tex.z-dn.net/?f=a%20%3D%206j)
The acceleration is
![a=60i+6j](https://tex.z-dn.net/?f=a%3D60i%2B6j)
We need to calculate the net force
![F = ma](https://tex.z-dn.net/?f=F%20%3D%20ma)
![F = 3.00\times(60i+6j)](https://tex.z-dn.net/?f=F%20%3D%203.00%5Ctimes%2860i%2B6j%29)
![F=180i+18j](https://tex.z-dn.net/?f=F%3D180i%2B18j)
The magnitude of the force
![|F|=\sqrt{(180)^2+(18)^2}](https://tex.z-dn.net/?f=%7CF%7C%3D%5Csqrt%7B%28180%29%5E2%2B%2818%29%5E2%7D)
![|F|=180.89\ N](https://tex.z-dn.net/?f=%7CF%7C%3D180.89%5C%20N)
Hence, The net force acting on this object is 180.89 N.
Answer: because there is no displacement or movement in the watchman's work. according to science when displacement or movement take place it is said to be work. hope this helps you.
Answer:
It would be hard to test scientifically since it's subjective and can only be proven true if you conducted some experimentations and observations.