Explanation:
A spring has a spring constant, (k), of 3 N/m. It is stretched until it is extended by 50 cm. Calculate the elastic potential energy stored by the spring, assuming it is not stretched beyond the limit of proportionality.
First convert centimetres to metres:
50 cm = 50 ÷ 100 = 0.5 m
Then calculate using the values in the question:
Ee=12 k e2
Ee=12×3×0.52
Ee=1.5×0.25
Ee=0.375 J
Luke stands on the edge of a roof throws a ball downward. It strikes the ground with 100J of kinetic energy. Luke now throws another identical ball upward with the same initial speed, and this too falls to the ground. Neglecting air resistance, the second ball hits the ground with kinetic energy of____J
A) Less than 100
B) 100
C) 200
D) More than 200
the rock of 10 kg is falling near the Earth's surface.assume that g =10N/kg and the is no air resistance. what is the acceleration of the rock
Answer:
kya faltu sawal h repetitive g=10N/kg
As frequency increases ______ decreases
A. Wavelength
B. Amplitude
C. Pitch
D. Volume
Answer:
a
Explanation:
wavelength and frequency are inversely related
Un atleta de helterofilia necesita levantar una barra de pesas, si necesita aplicar una fuerza para levantarla ¿cuales son los variables que intervienen para poder hacerlo?
Answer:
Se necesita la información de las siguientes variables:
(i) Fuerza normal entre los pies y la superficie.
(ii) Masa del atleta de halterofilia.
(iii) Masa de la barra de pesas.
(iv) Aceleración gravitacional.
(v) Fuerza normal entre la barra de pesas y la superficie.
(vi) Aceleración neta del centro de gravedad del sistema.
Explanation:
Sea el conjunto del atleta de halterofilia y la barra de pesas el sistema físico a estudiar. El fenómeno de levantamiento puede modelarse como traslación pura. Por las leyes de Newton tenemos que se necesita las siguientes variables para determinar la magnitud de la fuerza para levantarla (fuerza normal entre la mano y la barra de pesas) se requiere las siguientes variables:
(i) Fuerza normal entre los pies y la superficie.
(ii) Masa del atleta de halterofilia.
(iii) Masa de la barra de pesas.
(iv) Aceleración gravitacional.
(v) Fuerza normal entre la barra de pesas y la superficie.
(vi) Aceleración neta del centro de gravedad del sistema.
A slingshot is fired with an initial velocity of 100 m/s at an angle of 55° follows a parabolic trajectory and hits a stationary balloon at the top of its path. With what horizontal speed does the slingshot pebble hit the balloon?
Answer:
The horizontal speed with which the slingshot hits the balloon is approximately 57.358 m/s
Explanation:
The given parameters of the slingshot motion are;
The initial velocity of the slingshot, v = 100 m/s
The angle (to the horizontal) at which the slingshot is fired makes, θ = 55°
The path of the slingshot which hits the stationary balloon at the top of its flight = Parabolic trajectory
The horizontal component of the velocity = vₓ = v·cos(θ) = Constant
vₓ = 100 × cos(55°) ≈ 57.358
The horizontal speed with which the slingshot hits the balloon = vₓ ≈ 57.358 m/s.
PLEASE ANSWER MY QUESTION
Answer:
a) 4
b) 5
c) 2s
d) 10 m/s
e) 5-10m/s^2
want to zøom?
What do u know about how the earths land is formed hint it’s made of rocks
Answer:
it's made of land, rocks, water and many more
Explanation:
if you think about it, mountains are just giant rocks. and the ocean is water and land is... well land
Answer:
Well all Ik is that when the earth was formed it was a big hot rock then the water came in and settled it and the animals kinda became land creatures the yea
Explanation:
A car travels for 50mph for 5 hours, then for 30mph for another 3 hours in the same direction. What is the average speed the motorcycle traveled?
Answer:
42.5mph
Explanation:
The computation of the average speed is shown below:
As we know that
Speed = Distance ÷ Time
ANd, distance = Speed × time
So, the distance would be
= (50 × 5 hours) + (30 × 3)
= 250 + 90
= 340 miles
And, the total time taken is 8 hours
So, the average speed is
= 340 miles ÷ 8 hours
= 42.5mph
A roller coaster has a velocity of 25 m/s at the bottom of the first hill. How high was the hill?
PLEASE HELP
Answer:
The height of the hill is "31.85 m".
Explanation:
The given value is:
Velocity,
v = 25 m/s
As we know,
⇒ [tex]Kinetic \ energy =Potential \ energy[/tex]
i.e,
⇒ [tex]mgh=\frac{1}{2} mv^2[/tex]
⇒ [tex]gh=\frac{1}{2} v^2[/tex]
⇒ [tex]h=\frac{v^2}{2g}[/tex]
On substituting the given value, we get
⇒ [tex]h=\frac{(25)^2}{2\times 9.81}[/tex]
⇒ [tex]=\frac{625}{19.62}[/tex]
⇒ [tex]=31.85 \ m[/tex]
Given;
Velocity, v = 25 m/sWe know the relation,
→ [tex]Kinetic \ energy (K.E) = Potential \ energy (P.E)[/tex]
or,
→ [tex]mgh = \frac{1}{2}mv^2[/tex]
or,
→ [tex]gh = \frac{1}{2}v^2[/tex]
[tex]h = \frac{v^2}{2g}[/tex]
By putting the values, we get
[tex]= \frac{(25)^2}{2\times 9.81}[/tex]
[tex]= \frac{625}{19.62}[/tex]
[tex]= 31.85 \ m[/tex]
Thus the response above is right.
Learn more about velocity here:
https://brainly.com/question/15447166
At divergent boundaries, hot mantle rock rises and
occurs.
A football is thrown due north across a 40 meter river and it takes 2 seconds to cover that distance.
10. What is the speed of the football in meters per second?
11. What is the velocity of the football in meters per second?
HELP DUE TODAY!!
Answer:
I. Speed = 20m/s
II. Velocity = 20m/s due North.
Explanation:
Given the following data;
Distance = 40m
Time = 2secs
To find the speed;
Mathematically, speed is given by the formula;
[tex]Speed = \frac{distance}{time}[/tex]
Substituting into the equation, we have;
[tex]Speed = \frac{40}{2}[/tex]
Speed = 20m/s.
In physics, we use the same formula for calculating speed and velocity. The only difference is that speed is a scalar quantity and as such has magnitude but no direction while velocity is a vector quantity and as such it has both magnitude and direction.
[tex]Velocity = \frac{distance}{time}[/tex]
Therefore, the velocity is 20m/s due North.
Tonya and Mario are asked to use a pan balance to find the mass of the same rock. Tonya finds the rock's mass to be 680 grams. Mario finds the rock's mass to be 672 grams. Which is the best explanation for the difference in their measurements?
A. Either Mario or Tonya measured the mass of the rock incorrectly on the pan balance.
B. The rock was cold when Tonya measured its mass and hot when Mario measured in mass.
C. The rock changed in size between the time Tonya measured it and the time Mario measured it.
D. The rock broke before Mario measured it. So the mass of the two pieces together was less than when Tonya measured it.
Answer:
A or D i put a
Explanation:
Answer: Its Either Mario or Tonya measured the mass of the rock incorrectly on the pan balance.
Explanation: ...
describe the importance of measurements in brief.
Answer:
importance of measurement is it gives proper required amount of anything if it will not exist then alot of work be disrupted .In many work measurement is very necessary like in scientific works
Why do hot spots form a “chain of volcanoes?
because earth has lava underneath us all and it makes earthquakes and etc things like that
What is the mass of basswood wing with these dimensions: 26.9 cm x 5.5 cm x 0.15 cm?
The mass of the basswood wing with the given dimension is 710.14 g. Basswood is a low-density, light wood.
What is basswood?Basswood is a low-density, light wood that is mainly used for artistic work such as hand carving and creating musical instruments.
The mass can be calculated by the formula,
[tex]m = v \times d[/tex]
Where,
[tex]m[/tex]- mass
[tex]v[/tex] - volume = 26.9 cm x 5.5 cm x 0.15 cm = 22.192 ml
[tex]d[/tex] - density = 32 g/cm3
Put the values in the formula,
[tex]m[/tex] = 22.192 x 32
[tex]m[/tex] = 710.14 g
Therefore, the mass of the basswood wing with the given dimension is 710.14 g.
Learn more about mass:
https://brainly.com/question/26255895
Your brother's mass is 40.0 kg, and he has a 1.30 kg skateboard. What is the combined momentum of your brother
and his skateboard if they are going 8.50 m/s?
Answer:
351.05 kg * m/s
Explanation:
Combined momentum is denoted with this formula:
p = m₁v₁ + m₂v₂In other words, the combined momentum of two masses is the sum of their masses multiplied by their velocity.
Let m₁v₁ represent the brother's mass and velocity, and let m₂v₂ represent the skateboard's velocity.
List out the known variables:
m₁ = 40.0 kgv₁ = 8.50 m/sm₂ = 1.30 kgv₂ = 8.50 m/sSubstitute the known values into the equation.
p = (40.0)(8.50) + (1.30)(8.50) p = 340 + 11.05 p = 351.05The combined momentum of the brother and his skateboard is 351.05 kg * m/s.
You are walking from your math class to your science class. You are carrying books
that weigh 20 N. You walk 45 m down the hall, climb 15 m up the stairs, and then
walk another 30 m to your science class. What is the total work performed on your
books?
Answer:
1800J
Explanation:
Given parameters:
Weight of the book = 20N
Total distance covered = 45m + 15m + 30m = 90m
Unknown:
Total work performed on the books = ?
Solution:
To solve this problem we must understand that work done is the force applied to move a body through a certain distance.
So;
Work done = Force x distance
Work done = 20 x 90 = 1800J
Which of these is a result of gravitational lensing?
O the formation of multiple images of the same object
O the bending of light in an accelerating reference frame
O the curvature of space-time
Answer:
Answer is the formation of multiple images of the same object .
Explanation:
I hope it's helpful!
A bicyclist moves at a constant speed of 6 m/s. How long it will take for the point bicyclist to move 36 m?
Answer:
6 seconds
Explanation:
make me brainliest
Answer:
Somuchcringe answered correctly you mark him brainliest
Explanation:
How does a a magnet and paper clips relate to magnetic forces?
Answer:
they relate because one may be metal but they are both metal and they can be strong together if they are connected
Explanation:
they just are
A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)
3.9 m
4.0 m
39.2 m
40.0 m
Answer:
B
Explanation:
Which air mass would form over warm water?(1 point)
maritime tropical
continental tropical
continental polar
maritime polar
Answer:
A.) Maritime Tropical (mT)
Explanation:
Continental tropical is the air mass that forms over warm land.
Maritime Polar is the air mass that forms over cold water.
Continental polar is the air mass that forms over cold land.
So therefore A or Maritime Tropical is the correct answer
Describe the disadvantages of using uranium-238 for dating.
Explanation:
Mostly in metamorphic or lava materials is uranium-238 contained. Then no fossil could be estimated utilizing U 238 specifically. They should never be used combined due to the huge variations in the half-life of Carbon 14 with Uranium-238. It is only possible to be using carbon 14 to classify fossil from a very current generation.
A fly travels along the x-axis. His starting point is x = 16 m and his ending point 15x = - 25 m. His flight lasts 4.0 seconds How far has he flown, what is his displacement , what is his speed and what is his velocity?
Explanation:
Starting position at x = 16m
Ending position at x = -25m
Time of flight = 4s
Unknown:
Distance flown = ?
Displacement = ?
Speed = ?
Velocity = ?
Solution:
To find the distance flown, we should understand that the body is moving on the x - plane;
So distance = 16 + 25 = 41m
Displacement is 41m to the left or -x axis
Speed is the distance divided by the time taken;
Speed = [tex]\frac{distance}{time}[/tex] = [tex]\frac{41}{4}[/tex] = 10.25m/s
Velocity is 10.25m/s along -x axis
Im struggling on my physics work about velocity
Answer:
53.8
Explanation:
Knowns:
Distance - 1,400
Speed - 52
Unknowns:
Velocity - ?
V = 2([tex]\frac{Distance}{Time}[/tex])
V = 2([tex]\frac{1,400}{52}[/tex])
V = 2(26.9)
V = 53.8
if an ocean has a wavelength of 2 m and a frequency of 1 wave/s then it's speed is ___ m/s.
PLEASEEE HEPPP!!!!!
Which material would result in the greatest amount of energy transfer?
An absorber that is dark in color and rough.
A reflector that is dark in color and smooth.
An absorber that is light in color and rough.
A reflector that is light in color and smooth.
Answer:
A. The first option: An absorber that is dark in color and rough.
Explanation:
a material absorbs - or transfers the most thermal energy when it is dark in color and rough in texture.
The material that would result in the greatest amount of energy transfer will be an absorber that is dark in color and rough.
What is an absorber?A piece of a substance called an absorber is used to absorb a few of the energy of an incoming particle.
Depending on the application, absorbers can be manufactured of a range of materials, including lead, tungsten, and liquid hydrogen.
The majority of absorbers are found in particle detectors, but they are also utilized in particle accelerators to protect their components from radiation damage.
The material that would result in the greatest amount of energy transfer will be an absorber that is dark in color and rough.
Hence option A is correct.
To learn more about the absorber refer to the link;
https://brainly.com/question/23461193
An object with a mass of 5kg is accelerated at
10 m/s^2. Determine the net force on the object.
Answer:
The net force is 50 Newton
Explanation:
Mechanical Force
According to Newton's second law, the net force exerted by an external agent on an object of mass m is:
F=m.a
Where a is the acceleration produced on the object.
We are given the mass of the object m=5 kg and its acceleration [tex]a=10\ m/s^2[/tex].
The net force is:
F = 5 * 10
F = 50 N
The net force is 50 Newton
URGENT!!! TIMED!!!
A 130-kg football player runs at a speed of 8.0 m/s toward a 110-kg player who is standing still. After the big player tackles the smaller player, they fall together. With what speed do they fall?
Answer:
v₃ = 4.33 [m/s]
Explanation:
This problem can be solved by the conservation of linear momentum, where momentum is preserved before and after the crash or collision.
For this case, the following equation will be constructed. With values before the collision to the left of the equal sign and after the collision to the right of the equal sign.
[tex](m_{1}*v_{1})+(m_{2}*v_{2})=(m_{1}+m_{2})*v_{3}[/tex]
where:
m₁ = mass of the big football player = 130 [kg]
m₂ = mass of the second football player = 110 [kg]
v₁ = velocity of the big football player before the collision = 8 [m/s]
v₂ = velocity of the second football player before the collision = 0 (who is standing still).
v₃ = velocity of the two players after the collision [m/s]
Now replacing:
[tex](130*8)+(110*0)=(130+110)*v_{3}\\1040 = 240*v_{3}\\v_{3}=4.33[m/s][/tex]
If a steel block has a mass of 25.6 kg and is pushed with a force of 674 N, what is its acceleration after the force is applied?
26.3 m/s^2
17300 m/s^2
26.33 m/s^2
52.3 kg m/s
Answer: 26.3 m/s²
Explanation:
F = mass x acceleration
674 N = (25.6 kg)(a)
674/25.6 = 26.3
a = 26.3 m/s²
