Five race cars speed toward the finish line at the Jasper County Speedway. The table lists each car’s speed in meters/second. If each car has the same mass, which car will require the longest time to come to a full stop?Car A Car B Car C Car D Car E
890 m/s 850 m/s 790 m/s 895 m/s 870 m/s
Car A
Car B
Car C
Car D
Car E
Answers
Answer:
Car C
Explanation:
It is given that,
Five race cars speed toward the finish line at the Jasper County Speedway. The mass of each car has same mass. The speed of all cars are given as :
Car A = 890 m/s
car B = 850 m/s
Car C = 790 m/s
Car D = 895 m/s
Car E = 870 m/s
The distance is constant because the finish line is same for all cars. The speed of an object is given by the total distance covered divided by total time taken i.e.
Where
d = distance
t = time required by the car to come to a full stop
So, time taken is inversely proportional to the speed of the car. The car having less speed will take maximum time to come to stop. Hence, car C will require longest time to come to a full stop.
Answer:
Car D
Explanation:
The mass of the car is given the same. The initial velocities are also given. eventually all the cars come to a stop. The finish line would be crossed first by the fastest car. But If all the cars decelerate at the same rate then, we can find out the time taken to come to a full stop by first equation of motion,
final velocity, v = 0
if a is same for all cars.
Car D has maximum speed ( 895 m/s). So, Car D will take the maximum time to come to a stop.
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The Average Speed over the entire trip is 3.671 meters per second.
The person is moving in a straight line at a constant Speed. Let suppose that Distance between points A and B is , then we construct and use the Kinematic formulas for each stage of the travel to determine Times and Average Speed, based on the fact that Speed is inversely proportional to Time, we derive the resulting expression:
First Stage (from point A to point B):
(1)
Second Stage (from point B to point A):
(2)
Average Speed:
(3)
Where:
- Travelling time for the first stage, in seconds.
- Travelling time for the second stage, in seconds.
- Distance from A to B, in meters.
- Speed of the person in the first stage, in meters per second.
- Speed of the person in the second stage, in meters per second.
- Average speed, in meters per second.
By applying (1) and (2) in (3), we derive an expression to determine the Average Speed:
(4)
If we know that and
, the average speed over the entire trip is:
The Average Speed over the entire trip is 3.671 meters per second.
Please see this question related to Average Speed for further details: brainly.com/question/19335778
we know wacth:
Speed = distance / time.
Consider that:
distance from point A to point B=distance from point B to point A=d
We calculate the time to go from point A to point B.
time=distance / speed.
T₁=d / (5 m/s)
We calculate the time to go from point B to point A.
T₂=d / (2.9 m/s)
Therefore; the total time wil be: T₁+T₂
Total time=d/(5 m/s) + d / (2.9 m/s)
Least common multiple=(5 m/s)(2.9 m / s)=14.5 m²/s²
Total time=(2.9 m/s d + 5 m/s d)/ 14.5m²/s²
Total time=[(7.9 d) m/s] / (14.5 m²/s²)
Total time=7.9 d/ (14.5 m/s)
Now, the total distance will be =d+d=2d
Therefore:
Average speed=total distance / total time
Average speed=[(2d)] / [(7.9 d)/ (14.5 m/s)]
Average speed≈3.67 m/s.
Answer: the average speed will be ≈3.67 m/s.
Answers
256 kPa because p-guage + p-absolute + p-atmospheric = 256
Answer:
C. 256 kPa
Explanation
Answers
Answers
At first glance, this statement seems to be true. But after about a
microsecond of further consideration, one realizes that the statement
would actually set Boyle spinning in his grave, and is false.
Boyle's law states that there is a firm relationship among the pressure,
temperature, and volume of an ideal gas, and that you can't say anything
about how any two of these quantities depend on each other, unless you
also say what's happening to the third one at the same time.
As the pressure of an ideal gas increases, the volume will decrease in
direct proportion to the volume, IF THE TEMPERATURE OF THE GAS
REMAINS CONSTANT.
If you wanted to, you could increase the pressure AND the volume of an
ideal gas both at the same time. You would just need to warm it enough
while you squeeze it.
Answers
Answer:
Explanation:
During rescue missions, different types of energy can be devices for flashlight, this could be human powered energy such as squeezing or compressing. In flashlight electrical energy is converted to light and thermal energy.
A squeezing or compressing to get energy for flashlight can be regarded as "DYNAMO PROCESS" it involves spinning of "fly wheels" into the flashlight through consistent squeezing ,which is connected to a dynamo(Dynamo supply electrical current). Hence the needed light is seen on the bulb of the flashlight.
A squeeze flashlight or dyno torch is a form of mechanically powered flashlight that produces energy through the rotation of flywheel which then turns a dynamo or generator that powers an attached light emitting diode, LED or incandescent bulb when electric current is generated
Where there is need for artificial light, where direct electric power is not available, such as during a rescue operation, rescue workers can produce illumination by continuously pumping the dyno torch during the mission. The squeezing action causes the flywheel to turn, with the turning made to occur between each squeeze, by the flywheel. The rotational energy from the flywheel turns the generator, which produces steady lighting
Learn more about squeeze flashlights here:
Assume the Hunter has perfect aim, the monkey has zero reaction time and that air resistance is negligible.
Explain wether the monkey will avoid bring struck by the arrow.