Answer:
A.) 4.81 seconds
B.) 44.6 m/s
Explanation:
He begins his dive by jumping up with a velocity of 5 (m/s).
Let us first calculate the maximum height reached by using third equation of motion
V^2 = U^2 - 2gH
At maximum height, V = 0
0 = 5^5 - 2 × 9.8H
19.6H = 25
H = 25 /19.6
H = 1.28 m
The time taken for the diver to reach the water from the maximum height can be calculated by using second equation of motion.
Where height h = 1.28 + 100 = 101.28 m
h = Ut + 1/2gt^2
As the diver drop from maximum height, U = 0
101.28 = 1/2 × 9.8 × t^2
4.9t^2 = 101.28
t^2 = 101.28/4.9
t^2 = 20.669
t = sqrt ( 20.669)
t = 4.55s
As the diver jumped up, the time taken to reach the maximum height will be
Time = 1.28 / 5 = 0.256
The time taken for him to hit the water below will be 0.256 + 4.55 = 4.81 seconds
B.) Velocity right before he hits the water will be
V^2 = U^2 + 2gH
But U = 0
V^2 = 2 × 9.8 × 101.28
V^2 = 1985.09
V = 44.6 m/s
A.) The time taken should be 4.81 seconds
B.) The velocity should be 44.6 m/s
Calculation of the time taken and velocity:Here we used third equation of motion
V^2 = U^2 - 2gH
At maximum height, V = 0
Now
0 = 5^5 - 2 × 9.8H
19.6H = 25
H = 25 /19.6
H = 1.28 m
Here the second equation of motion.
Here height h = 1.28 + 100 = 101.28 m
So,
h = Ut + 1/2gt^2
Since the diver drop from maximum height, U = 0
So,
101.28 = 1/2 × 9.8 × t^2
4.9t^2 = 101.28
t^2 = 101.28/4.9
t^2 = 20.669
t = sqrt ( 20.669)
t = 4.55s
Now
Time = 1.28 / 5 = 0.256
Finally the time should be
= 0.256 + 4.55
= 4.81 seconds
B.)
We know that
V^2 = U^2 + 2gH
But U = 0
So,
V^2 = 2 × 9.8 × 101.28
V^2 = 1985.09
V = 44.6 m/s
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What is the mean of 4, 6, 8, 20, 12?
10
00
5
Answer:
mean= sum of all values/ total no. of values
values given= 4,6,8,20,12
= 4+6+8+20+12/5
=50/5=10
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PLZ MARK AS BRAINLIEST
if the coefficient of friction is root 3 the angle of friction is
Explanation:
The coefficient of friction = tanθ,
the angle would be 30∘
Answer:
Tan¯¹ /3=60 degree
Explanation:
you know coefficient is friction is equal to tan 0 equal to square root of 3 is equal to tan of civil 20 skills equal to 60 degree
what is systematic error
Answer: an error
Explanation:
Answer:
A consistent, repeatable error that isn't random. Usually associated with faulty equipment and the like.
What is the mode of 3, 9, 11, 11, 3, 6, 2, 2, 11?
0
11
2
5,5
Answer:11
Explanation: because is the number that repeted 2 times
What happens to the acceleration of an object if the net force on it increases?
OA. The acceleration increases.
OB.
The acceleration decreases.
O C.
The acceleration becomes zero.
OD.
The acceleration remains the same.
Answer:
A
Explanation:
The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased
In a paragraph, contrast the characteristics between anorexia and bulimia
Answer:
Anorexia disease is a disease where you eat to little and you exercise for long periods of time. They feel over weight when they are actually underweight. They weight themselves and restrict the food they eat. People with anorexia die from starvation. Bulimia disease is when people eat too much food. They do forced vomiting, excessive use of laxatives or diuretics, fasting, excessive exercise, or a combination of these behaviors. They have normal weight.
Explanation:
Sal is given a sample of an unknown liquid to test in the laboratory .sal thinks the liquid might be water .which of these physical properties
A it’s color
B. It’s mass
C it’s volume
D it’s density
us
Is this an example of a theory or law? Planets orbit the sun
elliptically.
Theory
Law
The answer to your question is law.
Multiple Choice
Which of the following was not required by the Massachusetts Education Law of 1642?
O
Children were to be educated in basic religious principles and the laws of the commonwealth.
O Children were to be able to read and write.
O Children of servants were included in the law as recipients of said education.
Children were to be sent to designated schoolmasters for their learning.
Answer:
What was not required by the Massachusetts Education law of 1642 is;
Children were to be sent to designated schoolmaster for their learning
Explanation:
The Law of 1642 required that parents and master see to it that their children knew the principles of religion and the capital laws of the commonwealth.
The important aspects of the 1642 Law includes;
1) The responsibility for the basic education and literacy of a child are those of the parents and masters of child apprentices
2) Reading and writing competency of all children and servants are a requirement
3) It is the duty of the government, where a parent or master are unable to meet their tutoring responsibility, to see that a child is placed where the basic educational requirement will be met.
The role of a schoolmaster or the setting of a formal school were yet to be formed as at that time.
Answer:
The correct answer is Children were to be sent to designated schoolmasters for their learning
The responsibility of educating children was on parents and apprenticeship masters, not on designated teachers or schoolmasters. However, the law did allow the government to step in if the supervising adults failed in their responsibilities.
Explanation:
A car accelerates from rest at 7.55 m/s2 for 4.25 s.
Determine the final velocity of the car.
And calculate the cars displacement.
Explanation:
This problem is on the motion of a car.
given data.
acceleration a=7.55m/s
time t= 4.25 sec
1. Determine the final velocity of the car.
we know that
acceleration= velocity/time
substituting our given data we have
7.55= v/4.25
v=7.55*4.25
v=32.08m/s
2. calculate the cars displacement.
we also know that
velocity= distance/time
distance= velocity*time
distance= 32.04*4.25
distance= 136.37m
what are muons in cosmology
Answer:
Explanation:
Muons in the atmosphere, a component of cosmic rays. Atmospheric muons are an essential component of cosmic ray showers. When a high energy primary particle coming from space collides with a nucleus of the upper atmosphere, it generates a spray of particles which later interact in their turn.
An object is projected with initial speed v0 from the edge of the roof of a building that has height H. The initial velocity of the object makes an angle α0 with the horizontal. Neglect air resistance. If α0 is 90∘, so that the object is thrown straight up (but misses the roof on the way down), what is the speed v of the object just before it strikes the ground?
Answer:
Explanation:
Initial velocity u = V₀ in upward direction so it will be negative
u = - V₀
Displacement s = H . It is downwards so it will be positive
Acceleration = g ( positive as it is also downwards )
Using the formula
v² = u² + 2 g s
v² = (- V₀ )² + 2 g H
= V₀² + 2 g H .
v = √ ( V₀² + 2 g H )
A cyclist must travel 800 kilometers. How many days will the trip take if the cyclist travels at an average speed of 16 km/h
Answer:
2 days 2 hours or 50 hours
Explanation:
800/16=50
Rhea kicks a soccer ball at 13 km/h to Sean. After kicking the ball, the speed of the soccer ball from Rhea’s reference frame is 13 km/h. The speed of the soccer ball from Sean’s reference frame is 22 km/h. Which conclusion is best supported by the information? A. Sean is standing still, and Rhea is running toward Sean while kicking the ball. B. Rhea is standing still after kicking the ball, and Sean is running away from Rhea. C. Both soccer players are standing still after the ball is kicked. D. Both soccer players are running while the ball is in motion.
Answer: Sean is standing still, and Rhea is running toward Sean while kicking the ball
Explanation: Your welcome :)
Answer: A:Sean is standing still and Rhea is running toward Sean while kicking the ball
Explanation:
edgen2020
A Force of 20N displaces a body about 45m how much work is done?
Answer:
159 ofc
Explanation:
Mickey walks Pluto 4 miles North to the dog park. Mickey finds beautiful
flowers in the park and decides to pick a bouquet. He then walks with
Pluto 3 miles West to give this new gift to Minnie. Mickey's distance is-
1 mile
5 miles
7 miles
12 miles
Help me I need this now
Answer:
If the height of the ramp is changed at a different height then the speed of the car will change.
TEST
16. What is the average velocity of Mulan as
she covers 20 min 3.5 s to meet her
matchmaker?
0.175 m/s
10 m/s
70 m/s
5.71 m/s
CLEAR ALL
4.46 x 1010 /6.52x 10-8 =
Answer:
690.8895705521 × 10^8 is the perfect answer of your question.
Convert 2,000 m ______ km
Answer:
[tex]2km[/tex]
Explanation:
[tex]1,000 m=1 km[/tex]
So if you have [tex]2,000m[/tex], there will be [tex]1km[/tex] per [tex]1,000m[/tex].
Therefore:
[tex]2000m=2km[/tex]
HELP ME PLZ ASAP ITS DUE ON MONDAY
Answer:
the answer in the paper
Answer:
5a. 11m, 5b. 16m, 5c. 9m, 5d. 7m 6a. 3m, 6b. 0m, 6c. 2m, 6d. 5m
Explanation:
I hope this helped and plz make brainliest!
Erica forgot to put gas in her car (again) for two weeks. The graph below shows the last few seconds of her car being stalled along Elkins Drive st 7:23 am Friday. During the time shown, what was the acceleration of her car?
a 54 m
b 108 m/s
c 3 m/s^2
D -3 m/s^2
Answer:
Option (D) : - 3 m/s^2
Explanation:
Acceleration = Slope of v-t graph
= 18/6
= - 3 m/s^2 (-ive since the car is decelerating )
What other angle would give the same range at 19 degrees?
Answer:
I think it is acute angle.
Explanation:
Because it is an angle between 0° and 90°. Hope this answer wil help you.
what do you mean by levels of professions
Answer:
your answer is.
I hope it will helpful for you
thank you
mark as brainest answer
What is the average speed of a motorcycle that goes 90 meters in 5 seconds?
Answer:18 m/s
Explanation:
Take=speed=distance /time
help quick plzz i need help
Matter is all around us and is made of atoms. How are atoms of different elements different from each other? How do these differences relate to their properties?
Answer:
it all depends on the protons and the neutrons of that element.
Determine how many Altuves you could travel in a day if you were moving at 45.000 mph all day. Altuve = 1.65 m
Answer:
The answer is below
Explanation:
Speed is the ratio of total distance traveled to the total time taken. It is given by the formula:
Speed = Distance / time taken
Given that the speed = The polynomial 45.000 mph.
In a day there are 24 hours, hence, the distance traveled is:
Speed = Distance / time taken
45 mph = Distance / 24 hours
Distance = 45 mph × 24 h = 1080 miles
But 1 mile = 1609.34 m
1080 miles = [tex]1080\ miles*\frac{1609.34 \ m}{1\ miles}=1738092\ m[/tex]
Given that Altuve = 1.65 m
Hence, the number of Altuve traveled = 1738092 m / 1.65 m = 1053389
1053389 Altuves was traveled
A woman drives to her office 10 km away from her house at 9 am, and
reaches her office at 9:20 am. She stays in the office until 6 p.m, and
then returns home at 6:25 p.m. Which answer gives the correct
distance and displacement at 6:25 p.m.?
The displacement of the woman at 6:25 pm is zero (0) while her total distance at 6:25 pm is 20 km.
The given parameters;
distance between the woman's house and her office, d = 10 kmtime to reach her office = 20 minutestime to return to her house = 25 minutesDisplacement is defined as the change in the position of an object. It can be described as 'how far' an object is displaced from the initial position.
The first position of the woman, x₁ = 10 km to officeThe final position of the woman, x₂ = 10 km back homeThe woman's displacement = x₂ - x₁ = 10 km - 10 km = 0
Distance is the total path covered by an object during motion.
Total distance of the woman at 6:25 pm = 10 km + 10 km = 20 km
Thus, we can conclude that the displacement of the woman at 6:25 pm is zero (0) while her total distance at 6:25 pm is 20 km.
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Identify which type of source is being described.
sources present original research, whereas
sources summarize scientific
information.
Answer:
Primary, secondary
Explanation:
Answer:
Identify which type of source is being described.
✔ Primary
sources present original research, whereas
✔ secondary
sources summarize scientific information.
Second Part----
Indicate whether each of the following is a primary source or a secondary source.
An article in Journal of the American Medical Association:
✔ primary source
An article in Time magazine:
✔ secondary source
An article in The New York Times newspaper:
✔ secondary source
Explanation:
Just did the problem.