Answer:
Joules=F*d, watts= J/s, Kwh= kw*h(time)
Explanation:
First, we need to know... what are we measuring with the different units:
Joules: This unit is used to measure energy and work.
![EnerKinec=\frac{1}{2} * m[kg]*v^{2} [m^{2}/s^{2} ]\\\\Enpot=m[kg]*g[m/s^{2}]*h[m]\\ \\Work=F[N]*d[m]](https://tex.z-dn.net/?f=EnerKinec%3D%5Cfrac%7B1%7D%7B2%7D%20%2A%20m%5Bkg%5D%2Av%5E%7B2%7D%20%5Bm%5E%7B2%7D%2Fs%5E%7B2%7D%20%20%5D%5C%5C%5C%5CEnpot%3Dm%5Bkg%5D%2Ag%5Bm%2Fs%5E%7B2%7D%5D%2Ah%5Bm%5D%5C%5C%20%5C%5CWork%3DF%5BN%5D%2Ad%5Bm%5D)
Watts: This unit is used to measure power, and is related to energy and work when we use the time. That is, power equals work or energy per unit of time.
![Power = \frac{work[J]}{time[s]} = [watts]](https://tex.z-dn.net/?f=Power%20%3D%20%5Cfrac%7Bwork%5BJ%5D%7D%7Btime%5Bs%5D%7D%20%3D%20%5Bwatts%5D)
KWh: This unit is used to measure the amount of power consumed, it is very common to see it on electric energy bills.
![Powerconsumed=Power*hoursworked\\\\Powerconsumed= power[kw]*hoursworked[hr]=[Kw-h]](https://tex.z-dn.net/?f=Powerconsumed%3DPower%2Ahoursworked%5C%5C%5C%5CPowerconsumed%3D%20power%5Bkw%5D%2Ahoursworked%5Bhr%5D%3D%5BKw-h%5D)
<span>The common designations are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma-rays. Visible light falls in the rangeof the EM spectrum between infrared (IR) and ultraviolet (UV).</span>
Answer:
c. 100 N
Explanation:
= mass of each = 55 kg
= Time period of rotation = 7.0 sec
Angular frequency is given as
![w = \frac{2\pi }{T} \\w = \frac{2(3.14) }{7}\\w = 0.897 rads^{-1}](https://tex.z-dn.net/?f=w%20%3D%20%5Cfrac%7B2%5Cpi%20%7D%7BT%7D%20%5C%5Cw%20%3D%20%5Cfrac%7B2%283.14%29%20%7D%7B7%7D%5C%5Cw%20%3D%200.897%20rads%5E%7B-1%7D)
= Diameter of the merry-go-round = 4.5 m
Radius of the merry-go-round is given as
![r = \frac{d}{2} = \frac{4.5}{2} = 2.25 m](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7Bd%7D%7B2%7D%20%3D%20%5Cfrac%7B4.5%7D%7B2%7D%20%3D%202.25%20m)
Magnitude of outward force is same as the centripetal force and is given as
![F = m r w^{2} = (55) (2.25) (0.897)^{2} \\F = 100 N](https://tex.z-dn.net/?f=F%20%3D%20m%20r%20w%5E%7B2%7D%20%3D%20%2855%29%20%282.25%29%20%280.897%29%5E%7B2%7D%20%5C%5CF%20%3D%20100%20N)
I’d love to help, but I can barely understand what you put