A model rocket is launched from the ground. It starts from rest and accelerates upward at 15.0 m/s2 for 3.00 s. Disregard gravity. What is the V2? b. Then, it has a downward acceleration of -10.0 m/s2 until it reaches its highest point. What is the highest above the ground that the rocket gets? c. What is the TOTAL time in the air?
Answer:
The final velocity v₂ is 45 m/s
The highest point reached by the rocket is 101.25 m
The total time spent in air by the rocket is 7.5 s
Explanation:
Given;
initial velocity of the rocket, v₁ = 0
final velocity of the rocket, v₂ = ?
upward acceleration of the rocket, a = 15 m/s²
time of acceleration, t = 3 s
The final velocity is given by;
v₂ = v₁ + at
v₂ = 0 + (15 x 3)
v₂ = 45 m/s
The highest point reached by the rocket is given by;
v² = u² + 2ah
where;
u is the initial velocity of rocket when it started decelerating.
thus, u = v₂
v is the final velocity of the rocket at its highest point = 0
0 = v₂² + 2ah
0 = (45)² + (2 x -10 )h
0 = 2025 - 20h
20h = 2025
h = 2025 / 20
h = 101.25 m
Time taken for the rocket to reach its highest point is given by;
h = ut + ¹/₂at²
101.25 = 45t + ¹/₂(-10)t²
101.25 = 45t - 5t²
5t² - 45t + 101.25 = 0
t² - 9t + 20.25 = 0
t = 4.5 s
The total time spent in air by the rocket is given by;
T = upward time + downward time
T = 3 s + 4.5 s
T = 7.5 s
The stage of respiration that releases most of the energy in glucose occurs in the ______.
What happens to the lost mass during nuclear reactions in a star's core?
O It is destroyed
O It becomes dark matter
O It is ejected into space
O It is converted to energy
If a force of 20 N is applied to a mass of 5 kg, what is the acceleration?
Answer:
4 m/s^2
Explanation:
To get the acceleration you are going to use the acceleration formula which is
Acceleration= Force/Mass.
You then do the math which is 20/5, which equals 4
Therefore you get a value of 4. You may be asking what the units are. The units of acceleration are m/s^2 (meters per second squared)
So your final answer is 4 m/s^2
Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 250 amps?
Answer:
V= I x R =250 x 0.0198 = 4.95 Volts
Explanation:
The voltage across the resistor is 4.95 Volts.
How do you calculate the voltage?Given that the resistance is 0.0198 ohms and the current flowing through the silver is 250 amps.
The voltage V across the resistor is the product of the current I flowing through the resistors and resistance R.
[tex]V = IR[/tex]
Substituting the values, we get the voltage.
[tex]V = 250 \times 0.0198[/tex]
[tex]V = 4.95 \;\rm V[/tex]
Hence we can conclude that the voltage across the resistor is 4.95 Volts.
To know more about the voltage, follow the link given below.
https://brainly.com/question/238298.
A car traveling around a corner
A. position
B. speed
C. velocity
D. acceleration
THE ANSWER IS D THERE YOU GOO
A car traveling on 1-96 approached a construction zone and slowed from 65 miles per hour (30 meters/second) to 45 mph (20m/s) in
5 seconds. Calculate the distance the car will take to slow down.
What does normal force have to do with gravity?
Answer:
grav times mass equals force
Explanation:
What was the instantaneous speed of Bear A at 5 seconds in meters/min? (No unit conversions necessary, no units required for answer).
Answer:
Answer: The answer is 40.
Explanation: There is a typo, they mean 5 minutes. Five minutes is the line between zero and 10, and the dot matches up at 5 and 200. 200 divided by 5= 40.
(i got this answer from: https://brainly.com/question/18253554)
Which of the cars has a displacement North of its initial position?
A car travels North for 5 miles, turns around and returns to the starting position.
A car travels North for 5 miles, turns around and returns to the starting position.
A car travels South for 5 miles, turns around and returns to the starting position.
A car travels South for 5 miles, turns around and returns to the starting position.
A car travels North for 5 miles, turns around and travels South for 8 miles.
A car travels North for 5 miles, turns around and travels South for 8 miles.
A car travels South for 5 miles, turns around and travels North for 8 miles.
The correct answer is A car travels South for 5 miles, turns around, and travels North for 8 miles.
Explanation:
Displacement is determined by the change in position. This means there is displacement if the initial position of a body such as a car is different from the final position. Also, the displacement is considered in terms of direction (North, South, East, West). In this context, if a car travels South or North and then returns to its initial position there is no displacement.
According to this, the only option that shows a displacement North is "A car travels South for 5 miles, turns around and travels North for 8 miles" because in this case, the car had a change in position as it first moved 5 miles south (a displacement of 5 miles South) and then 8 miles north, which changes the displacement to 3 miles North (5 miles South - 8 miles North = 3 miles North).
Consider a spring that does not obey Hooke's law very faithfully. One end of the spring is fixed. To keep the spring stretched or compressed an amount x, a force along the x-axis with x-component Fx=kx−bx2+cx3 must be applied to the free end. Here k=100N/m, b=700N/m2, and c=12000N/m3. Note that x>0 when the spring is stretched and x<0 when it is compressed.
Answer:
The work done will be 0.115 J.
Explanation:
Given that,
[tex]k=100\ N/m[/tex]
[tex]b=700\ N/m^2[/tex]
[tex]c=12000\ N/m^3[/tex]
A force along the x-axis with x-component,
[tex]F(x)=kx-bx^2+cx^3[/tex]
Suppose, How much work must be done to stretch this spring by 0.050 m from its unstretched length?
We need to calculate the work done
Using formula of work done
[tex]W(x)=\int{F(x)dx}[/tex]
Put the value into the formula
[tex]W(x)=\int{(kx-bx^2+cx^3)dx}[/tex]
[tex]W(x)=\dfrac{kx^2}{2}-\dfrac{bx^3}{3}+\dfrac{cx^4}{4}[/tex]
Put the value of k,b,c and x
[tex]W(0.050)=\dfrac{100\times(0.050)^2}{2}-\dfrac{700\times(0.050)^3}{3}+\dfrac{12000\times(0.050)^4}{4}[/tex]
[tex]W(0.050)=0.115\ J[/tex]
Hence, The work done will be 0.115 J.
The value of spring displacement is greater than zero. Therefore, spring is stretched.
Force in spring :
It is given as, [tex]F=kx[/tex]
Where k is constant and x is amount of displacement.
The force function is given that,
[tex]F(x)=kx-bx^{2}+cx^{3}[/tex]
Here given that, [tex]k=100N/m, b=700N/m^{2} , c=12000N/m^{3} .[/tex]
Substitute all values in above equation,
[tex]F(x)=100x-700x^{2} +12000x^{3}[/tex]
To check, the spring is stretched or it is compressed.
Substitute f(x) = 0
We get x is greater than zero.
Thus, The value of spring displacement is greater than zero. Therefore, spring is stretched.
Learn more about the spring force here:
https://brainly.com/question/14970750
Newton's second law of motion is also known as
a) quantitative law of motion
b) quantitative law of force
c) qualitative law of motion
d) qualitative law of force
Answer:
Newton's second law of motion is quantitative law of force . Newton's first law of motion is qualitative law of force.
What is the momentum of a 950 kg car moving at 10.0 m/s?
9.5 kgm/s
95 kgm/s
9500 kgm/s
95000 kgm/s
Answer:
The answer is 9500 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocityFrom the question
mass = 950 kg
velocity = 10.0 m/s
We have
momentum = 950 × 10
We have the final answer as
9500 kgm/sHope this helps you
Why do mass numbers have a trailing decimal? use the following words describe for credit isotopes protons neutrons electrons in carbon 13
HELP ME
Answer:a number without a decimal are generally not significant. Isotopes are atoms of same element which have the same atomic number but different number of neutrons. Isotopes of elements are represented in the following way: In an atom, the number of protons is equal to its atomic number.. An atom of an element is neutral in nature so atom contains the same number of protons and electrons.
Explanation:
Why do humans still think there is a god even though science has proven them wrong every time?
Answer: everyone has a religious belief
Explanation:
You have a belief as well called Scientology
You believe science is more powerful then religion
They also need it as an excuse to think there is somewhere to go when you die so they make the good place heaven and hell
Answer:
people need to believe that there is a higher power guiding them. to explain events that they don't understand. that there is a reason for their existence. people need something to believe in. and you can't say someone's belief is wrong just because you don't agree with it or share that same belief.
Explanation:
physical egicatinal facts
Answer:
???????? please give for info
Define the amplitude of a wave
Answer:
amplitude of a wave is the maximum displacement of a particle from its rest position
Pls Answer I have a time limit!!!
How can mass be measured?
Group of answer choices
bathroom scale
spring scale
balance
scale
Answer:
Balance scale would be the answer
Answer:
The basic SI unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses.
Balanced Scale
What are three ways less gravity changes the human body
The speed of a fishing boat is 15 km/hr. How far will the boat travel in 6 hours?
Answer: 90 Km
Explanation:
15 Km/hr X 6/hr = 90Km
Write how the pairs of words or phrases are alike and different. Conservation of energy and energy transferConservation of energy: Energy is neither created nor destroyed in an ordinary chemical or physical process; this is also known as the first law of thermodynamics.Energy transfer: The transfer of energy from one object to another or from one form to another.Alike: Different:
Answer:
Similarities:
Energy can be transferred from one form to another in both systems.
Difference:
Energy can only be created or destroyed in conservation of energy.
Explanation:
Conservation of energy: tell us that energy can neither be created nor destroyed, but can be transferred from one form to another. e.g Chemical to mechanical ( combustion of fuel in vehicle to achieve mechanical work. )
Energy transfer Conservation
Energy can be stored or transferred from one form to another, but it cannot be created or destroyed.
Similarities:
Energy can be transferred from one form to another in both systems.
Difference:
Energy can only be created or destroyed in conservation of energy.
How can a small boy balance a big boy
on asea- saw ? Show with a diagram
Answ
— How can a small boy balance a big boy on a sea-saw? Show with a diagram. fast please...... Get the answers you need, now!
2 answers
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Explanation:
In a game of tug-of-war, a rope is pulled to the left with a force of 75 N and to the right with a force of 100 N. What is the magnitude and direction of the net external force on the rope?
Answer:
25 N to the Right
Give me an example of heterogeneous mixture
Answer:
oil and water
Explanation:
3. A 10 kg dog ran across a field at a speed of 12 m/s. How much kinetic energy did it have?
Knowing that 1 inch is equal to 2.54 centimeters, convert 287 cm to inches.
Answer: 112.992
Explanation: If you divide 287 by 2.54, you will get 112.992125984. I just got rid of the five numbers after 992.
1 inch = 2.54 cm
?= 287 cm let, ? be (a)
cross multiply
2.54a= 1×287
a= 287/2.54
a= 112.992126
therefore 287 cm = 112.992126 inches.
whu is it important to mave regular supervision of weights and measurements in the market
Answer:
Hope the answer helped you. if yes pls follow me
Explanation:
the fundamental answer is without regular supervision of definition of weights and measures,commerce exchange will be impossible and there would be no market whatsoever for anything.
Answer:
the fundamental answer is without regular supervision of definition of weights and measures,commerce exchange will be impossible and there would be no market whatsoever for anything.
Explanation:
"who"
The diagram represents Earth's orbit around the Sun. Where is the Sun located in this ellipse?
A)
At the center
B)
At the periphery
At the epicenter
D)
At one of the two foci
Submit
Helpppppp
Answer:
Its a D.
Explanation:
Round the following answer to the correct number of
significant figures. 25.657 + 134.24 = ? *
Answer:
I'm pretty sure its 160, correct me if I am wrong
Explanation:
Answer:
ya it is 160
Explanation:
the original answer is 159.897 so if u round it to 3 Sig u get 160
HEY CAN ANYONE PLS ANSWER DIS!!!!!!!
Answer:
A) the one with the lower boiling point.
Please mark me brainliest! Hope this helped!
God bless :)