Answer:
It will be equivalent to 338.95 N-m
Explanation:
We have to convert 250 lb-ft to N-m
We know that 1 lb = 4.45 N
So foe converting from lb to N we have to multiply with 4.45
So 250 lb = 250×4.45 =125 N
And we know that 1 feet = 0.3048 meter
Now we have to convert 250 lb-ft to N-m
So ![250lb-ft=250\times 4.45N\times 0.348M=338.95N-m](https://tex.z-dn.net/?f=250lb-ft%3D250%5Ctimes%204.45N%5Ctimes%200.348M%3D338.95N-m)
So 250 lb-ft = 338.95 N-m
Answer:
The kinetic energy of A is twice the kinetic energy of B
Explanation:
Answer:
Opened Push-button Switch (i.e. a PTM Switch)
Explanation:
Tha's just another symbol for a switch, but this one specifies that the switch is a push-button type of switch.
Since it's not touching and completing the line, the state of the switch is initially open.
A torque wrench tool is a tool that ensures that a fastener has the proper amount of tightness.
<h3>What is the torque wrench used for?</h3>
The torque wrench tool is used to ensure screws and bolts are properly tightened. When performing home repairs and maintenance of equipment it is quite important that a torque wrench is used in other to prevent a scenario where a fastener (screws and bolts) does not become loose leading to equipment failure or damage. Because of its many advantages, this tool is often found in the possession of construction workers.
You can learn more about the benefits of a torque wrench tool here
brainly.com/question/15075481
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An automobile travels along a straight road at 15.65 m/s through a 11.18 m/s speed zone. A police car observed the automobile. At the instant that the two vehicles are abreast of each other, the police car starts to pursue the automobile at a constant acceleration of 1.96 m/s2 . The motorist noticed the police car in his rear view mirror 12 s after the police car started the pursuit and applied his brakes and decelerates at 3.05 m/s2
Find the total time required for the police car to over take the automobile.
Answer:
15.02 sec
Explanation:
The total time required for the police car to overtake the automobile is related to the distance covered by both cars which is equal from instant point of abreast.
So; we can say :
![D_{pursuit} =D_{police}](https://tex.z-dn.net/?f=D_%7Bpursuit%7D%20%3DD_%7Bpolice%7D)
By using the second equation of motion to find the distance S;
![S= ut + \dfrac{1}{2}at^2](https://tex.z-dn.net/?f=S%3D%20ut%20%2B%20%5Cdfrac%7B1%7D%7B2%7Dat%5E2)
![D_{pursuit} = (15.65 *12 )+(15.65 (t)+ (\dfrac{1}{2}*(-3.05)t^2)](https://tex.z-dn.net/?f=D_%7Bpursuit%7D%20%3D%20%2815.65%20%2A12%20%29%2B%2815.65%20%28t%29%2B%20%28%5Cdfrac%7B1%7D%7B2%7D%2A%28-3.05%29t%5E2%29)
![D_{pursuit} = (187.8)+(15.65 \ t)-0.5*(3.05)t^2)](https://tex.z-dn.net/?f=D_%7Bpursuit%7D%20%3D%20%28187.8%29%2B%2815.65%20%5C%20t%29-0.5%2A%283.05%29t%5E2%29)
![D_{pursuit} = (187.8+15.65 \ t-1.525 t^2)](https://tex.z-dn.net/?f=D_%7Bpursuit%7D%20%3D%20%28187.8%2B15.65%20%5C%20t-1.525%20t%5E2%29)
![D_{police} = ut _P + \dfrac{1}{2}at_p^2](https://tex.z-dn.net/?f=D_%7Bpolice%7D%20%3D%20ut%20_P%20%2B%20%5Cdfrac%7B1%7D%7B2%7Dat_p%5E2)
where ;
u = 0
![D_{police} = \dfrac{1}{2}at_p^2](https://tex.z-dn.net/?f=D_%7Bpolice%7D%20%3D%20%20%5Cdfrac%7B1%7D%7B2%7Dat_p%5E2)
![D_{police} = \dfrac{1}{2}*(1.96)*(t+12)^2](https://tex.z-dn.net/?f=D_%7Bpolice%7D%20%3D%20%20%5Cdfrac%7B1%7D%7B2%7D%2A%281.96%29%2A%28t%2B12%29%5E2)
![D_{police} = 0.98*(t+12)^2](https://tex.z-dn.net/?f=D_%7Bpolice%7D%20%3D%200.98%2A%28t%2B12%29%5E2)
![D_{police} = 0.98*(t^2 + 144 + 24t)](https://tex.z-dn.net/?f=D_%7Bpolice%7D%20%3D%200.98%2A%28t%5E2%20%2B%20144%20%2B%2024t%29)
![D_{police} = 0.98t^2 + 141.12 + 23.52t](https://tex.z-dn.net/?f=D_%7Bpolice%7D%20%3D%200.98t%5E2%20%2B%20141.12%20%2B%2023.52t)
Recall that:
![D_{pursuit} =D_{police}](https://tex.z-dn.net/?f=D_%7Bpursuit%7D%20%3DD_%7Bpolice%7D)
![(187.8+15.65 \ t-1.525 t^2)= 0.98t^2 + 141.12 + 23.52t](https://tex.z-dn.net/?f=%28187.8%2B15.65%20%5C%20t-1.525%20t%5E2%29%3D%20%200.98t%5E2%20%2B%20141.12%20%2B%2023.52t)
![(187.8 - 141.12) + (15.65 \ t - 23.52t) -( 1.525 t^2 - 0.98t^2) = 0](https://tex.z-dn.net/?f=%28187.8%20-%20141.12%29%20%20%2B%20%2815.65%20%5C%20t%20%20-%20%2023.52t%29%20%20-%28%201.525%20t%5E2%20%20%20%20-%200.98t%5E2%29%20%20%3D%20%20%200)
= 46.68 - 7.85 t -2.505 t² = 0
Solving by using quadratic equation;
t = -6.16 OR t = 3.02
Since we can only take consideration of the value with a positive integer only; then t = 3.02 secs
From the question; The motorist noticed the police car in his rear view mirror 12 s after the police car started the pursuit;
Therefore ; the total time required for the police car to over take the automobile = 12 s + 3.02 s
Total time required for the police car to over take the automobile = 15.02 sec