Answer:
b) weaker
Explanation:
Hot rolled steel is generally weaker than the cold drawn steel. The yielding stress of cold rolled steel is higher than than hot rolled steel. At the same time the crystal structure remain the same in cold rolled steel. Giving it a better surface finish and closer tolerances. The strength and hardness of a cold roll steel is higher than the hot rolled steel
<span>A pliable sheetlike structure acting as a boundary, lining, or partition in an organism.</span>
The runner's acceleration during this time interval is 10 ![m/s^2](https://tex.z-dn.net/?f=m%2Fs%5E2)
<u>Given the following data:</u>
- Initial velocity, U = 0 m/s (since the sprinter is starting from rest).
- Final velocity, V = 10.0 m/s
To calculate the runner's acceleration during this time interval, we would use the first equation of motion;
Mathematically, the first equation of motion is calculated by using the formula;
![V = U + at](https://tex.z-dn.net/?f=V%20%3D%20U%20%2B%20at)
<u>Where:</u>
- U is the initial velocity.
- t is the time measured in seconds.
Substituting the given parameters into the formula, we have;
![10 = 0 + a(1)\\\\10 = a](https://tex.z-dn.net/?f=10%20%3D%200%20%2B%20a%281%29%5C%5C%5C%5C10%20%3D%20a)
Therefore, the runner's acceleration during this time interval is 10 ![m/s^2](https://tex.z-dn.net/?f=m%2Fs%5E2)
Read more: brainly.com/question/8898885
Answer:
<em>P = 1500 Watt</em>
Explanation:
<u>Mechanical Work and Power
</u>
Mechanical work is the amount of energy transferred by a force.
Being F the magnitude of the force vector and s the distance, the work is calculated as:
W=F.s
Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.
The power can be calculated as:
![\displaystyle P=\frac {W}{t}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20P%3D%5Cfrac%20%7BW%7D%7Bt%7D)
Where W is the work and t is the time.
The force to be considered is the weight of the mass of m=100 kg,
:
F = 100 * 10 = 1000 N
The distance is s=3 m, thus the work done by the weight lifter is:
W = 1000 N * 3 m
W = 3000 J
Finally, the power is:
![\displaystyle P=\frac {3000}{2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20P%3D%5Cfrac%20%7B3000%7D%7B2%7D)
P = 1500 Watt
This demonstration doesn't tell anything about the force of gravity.
But it does demonstrate that the acceleration of gravity is the same
for all objects, no matter what they weigh.