Answer:
Car has more power output than crane
Explanation:
We have given that mass of the crane m = 1000 kg
Height through which crane lift the steel beam h = 10 m
Acceleration due to gravity ![g=9.8m/sec^2](https://tex.z-dn.net/?f=g%3D9.8m%2Fsec%5E2)
So work done by crane ![W=mgh=1000\times 9.8\times 10=98000j](https://tex.z-dn.net/?f=W%3Dmgh%3D1000%5Ctimes%209.8%5Ctimes%2010%3D98000j)
Time period is given as t = 5 sec
We know that power ![P=\frac{W}{t}=\frac{98000}{5}=19600watt](https://tex.z-dn.net/?f=P%3D%5Cfrac%7BW%7D%7Bt%7D%3D%5Cfrac%7B98000%7D%7B5%7D%3D19600watt)
Now mass of the car = 1000 kg
Initial velocity u = 0 m /sec
Final velocity v = 10 m/sec
We know that work done is equal to the change in kinetic energy
So work done ![=\frac{1}{2}mv^2-\frac{1}{2}mu^2](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1%7D%7B2%7Dmv%5E2-%5Cfrac%7B1%7D%7B2%7Dmu%5E2)
![=\frac{1}{2}\times 1000\times 10^2-\frac{1}{2}\times 1000\times 0^2=50000j](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1%7D%7B2%7D%5Ctimes%201000%5Ctimes%2010%5E2-%5Cfrac%7B1%7D%7B2%7D%5Ctimes%201000%5Ctimes%200%5E2%3D50000j)
Time ids given as t = 2 sec
So power ![P=\frac{W}{t}=\frac{50000}{2}=25000watt](https://tex.z-dn.net/?f=P%3D%5Cfrac%7BW%7D%7Bt%7D%3D%5Cfrac%7B50000%7D%7B2%7D%3D25000watt)
So car has more power output than crane
How about a carousel (merry go round).
For any one horse or rider, Speed is constant but direction keeps changing, so velocity does too.
Answer:
.....................................................................
The period of physical changes to sex characteristics that marks the beginning of adolescence in males and females is Puberty.
Plastic and wood is a couple