Answers
Answer:
38Watts
Explanation:
Given parameters:
Mass = 75kg
height = 8.5m
time = 165s
Unknown:
Power = ?
Solution:
Power is the rate at which work is done.
Power = [tex]\frac{work done}{time}[/tex]
Work done = mgh
m is the mass
g is the acceleration due to gravity = 9.8m/s²
h is the height
Now insert the parameters and solve;
P = [tex]\frac{75 x 9.8 x 8.5}{165}[/tex] = 38Watts
Related Questions
The coefficient of friction between the wheels of a 2500 kg Hearse and the dry pavement is 0.85. Determine the acceleration that the car experiences while skidding to a stop.
Answers
Answer Calculate the centripetal force exerted on a 900 kg car that negotiates a 500 m radius curve at 25.0 m/s. Assuming an unbanked curve, find the minimum static coefficient of friction, between the tires and the road, static friction being the reason that keeps the car from slipping (see Figure 2). Strategy and Solution for Part 1
Which of the following best describes the circuit shown below?
A. Parallel
B. Open
Ο Ο
C. Short
O
D. Series
Answers
Answer:
A..............hope it will help you
What is the net force of a motorcycle if it has a mass of 250 kg and an acceleration of 68 m/s2?
Answers
NF=ma
NF=250*68
NF=17,000
Good luck!!
A sound wave is produced in a metal cylinder by striking one end. Which of the following occurs as
the wave travels along the cylinder?
a. Its frequency increases
b. It transfers matter
C. It transfers energy
d. Its amplitude increases
Answers
Answer:
C. It transfers energy
Explanation:
As the metal cylinder is strike at one end, energy is being transferred.
A wave is a disturbance that transmits energy from one point to another. All waves are prominent for their energy transfer potentials. Waves do not move materials of the medium. The frequency of the wave does not increases same with the amplitude. The most important thing about a wave is the ability to transmit energy2
Which of the following best describes temperature?
A
Number of molecules
B
Motion of molecules
C
Size of molecules
D Type of molecules
Answers
Answer:
B
Explanation:
Answer:
b the motion of molecules
Explanation:
i just took the test and it makes the most sense
A 438 gram ball is traveling east at 39 m/s when it is hit by a 2.4 kg softball bat. After being in contact with the bat for 302 ms, the ball rebounds at a speed of 28 m/s.
Determine the impulse vector (magnitude and direction) in kg*m's felt by the bat. Treat east as the positive direction.
Answers
Answer:
The magnitude of the impulse vector of the bat is 29.346 kg.m/s
The direction of the impulse vector of the bat is in the initial direction of the ball before impact
Explanation:
The given parameters are;
The mass of the ball, m₁ = 438 g
The speed of the ball = 39 m/s
The mass of the softball bat = 2.4 kg
The time of contact = 302 ms = 0.302 seconds
The speed of rebound = 28 m/s
The impulse = The change in momentum = Δp = F × Δt = m × Δv
The impulse on the ball = m₁ × Δv = 0.438 × (39 - (-28)) = 29.346 kg·m/s
Given that force of reaction of the bat is in opposite direction but equal to the force of the ball, and the time and the duration of contact with the ball is the same for both the ball and the bat, the impulse vector ore equal and opposite
Therefore, the magnitude of the impulse vector of the bat = 29.346 kg.m/s
The direction of the impulse vector of the bat = The initial direction of the ball before impact.
NEED HELP!?Which of the following combinations would result in the greatest acceleration?
A 60N & 2.0kg
B 1N & 0.20kg
C 5N & 0.35 kg
D 12N and 1.0 kg
Answers
Answer:
The greatest acceleration is presented in option A 60N & 2.0kg
Explanation:
The second Newton's law relates the net force F exerted on an object of mass m and the acceleration it has by the equation:
F=m.a
The acceleration is found by solving the equation for a:
[tex]\displaystyle a=\frac{F}{m}[/tex]
Let's compare the different options and choose the greatest acceleration.
A F= 60 N, m= 2 Kg.
[tex]\displaystyle a=\frac{60}{2}=30\ m/s^2[/tex]
B F= 1 N, m= 0.20 Kg.
[tex]\displaystyle a=\frac{1}{0.2}=5\ m/s^2[/tex]
C F= 5 N, m= 0.35 Kg.
[tex]\displaystyle a=\frac{5}{0.35}=14.29\ m/s^2[/tex]
D F= 12 N, m= 1 Kg.
[tex]\displaystyle a=\frac{12}{1}=12\ m/s^2[/tex]
The greatest acceleration is presented in option A 60N & 2.0kg
. TRUE OR FALSE: ALL THE FOOD WE EAT TODAY STARTED OUT AS WILD VERSIONS.
Answers
Answer:
i believe its true
Explanation:
i hope this helps
Answer:
maybe true
Explanation:
if we eat good then we will stay healthy
At the top of a hill that is 4.37 meters high, a 70 kg skate boarder has 3000 1 point
joules of potential energy. What is his speed at the bottom of the hill where
his potential energy is zero?
Answers
Answer:
9.26m/s
Explanation:
Given parameters:
Height of the hill = 4.37m
Mass of skate boarder = 70kg
Potential energy = 3000J
Unknown:
Speed at the bottom of the hill = ?
Solution:
At the bottom of the hill, the total potential energy is the same as the kinetic energy.
Potential energy = Kinetic energy
mgh = [tex]\frac{1}{2}[/tex]mv²
2mgh = mv²
v² = 2gh
v = √2gh
g is the acceleration due to gravity
h is the height
v = √2 x 9.8 x 4.37 = 9.26m/s
The chart shows the percentage of different elements in the human body.
Which element is the most prevalent in the human body?
nitrogen
hydrogen
carbon
oxygen
Answers
why can you hear a mans voice around the corner of a building even if you can't see him
Answers
Answer:
A. Diffraction
Explanation:
You can immedietly mark out C and D, they make no sense. And reflection is the bending of light, leaving you with A. Diffraction
You marked this question as mathematics even though it belong in physics, please try to categorize it accordingly next time.
May I have brainliest please? :)
Answer:
A. Diffraction
Explanation:
Ape.x
A car starts from rest and accelerates at 15 m/s2 for 3.0 s. What is its top speed?
Answers
Answer:
45m/s
Explanation:
V=t*a =15*3= 45m/s
Bob roller skates with a constant speed of 6 miles per hour. How long
will he take to travel a distance of 128 miles ?
Answers
STATION
Solving Equations
A girl pushes on a box with a mass of
42 kg and it moves at an acceleration
of 7m/s2. With what force does the
girl push on the box?
J. 6 N
K. 35 N
L. 49 N
M. 294 N
Someone please answer it’s due today and I am so confused
Answers
F = ma
F = (42kg) (7m/s2)
F = 294 N
Answer M
The force used by the girl in pushing the box is 294 Newtons.
Hence, option M) 294N is the correct answer.
What is force?Force is simply a push or pull capable of changing the state of rest or motion of an object.
From Newton's second law of Motion;
F = ma
Where m is mass of object and a is acceleration.
Given the data in the question;
Mass of box m = 42kgAcceleration a = 7m/s²Force applied F = ?We substitute our given values into the expression above.
F = ma
F = 42kg × 7m/s²
F = 294kgm/s²
F = 294N
The force used by the girl in pushing the box is 294 Newtons.
Hence, option M) 294N is the correct answer.
Learn more about force here: https://brainly.com/question/27196358
#SPJ2
HELPP ILL GIVE 20 BRAINLIST!!!
__________ powers are powers in which authority is shared by both the federal and state governments.
A.
Reserved
B.
Federalist
C.
Delegated
D.
Concurrent
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
C. Delegated
Explanation:
Answer:
its letter C
Explanation:
just trust
What is the basic action of any muscle
Answers
The main and basic action of any single muscle that would have on a body would be the fact that it would contain "contraction" to which your muscle would practically contract each other, which would then give to power to force, push, push, and to make work, and also, to move.
PLEASE MARK ME AS BRAINLIEST
Answer:
The person above is correct, The Answer is "CONTRATION" just verified it by ap.ex ;)
Explanation:
What type of motion does an object have if it is falling with terminal velocity ?
Answers
Answer:
I believe force :|
Explanation:
A circuit is made up of a bar magnet, a wire coil, an ammeter and connecting
wires. Which part could you exclude from the circuit and still have a working
electromagnet?
A. The wire coil
B. The bar magnet
O
C. The connecting wires
D. The ammeter
Answers
Answer: the ammeter
Explanation:
Answer:
The answer is D. The ammeter.
Explanation:
I took the quiz.
Una larga fanja de pavimento tiene marcas a intervalos de 10m. Los estudiantes usan cronometros para registrar los tiempos en que un automovil pasa por cada marca. Asi han obtenido los datos siguientes: Distancia,m l 0 l 10 l 20 l 30 l 40 l 50 l Tiempo,s l 0 l 2.1 l 4.2 l 6.3 l 8.4 l 10.5 l A) Cual es la rapidez media del vehiculo? B) Al cabo de cuanto tiempo la distancia es igual a 34m? C) Cual es la aceleracion del automovil?
Answers
Answer:
men
Explanation:
_______________________________ gives the people with intellectual disabilities a chance to develop their self confidence and compete with others with similar interests.
Group of answer choices
Summer Olympics
Winter Olympics
Special Olympics
Paralympic Games
Answers
Answer:
special Olympics its the correct answer
The focus of an earthquake is the: center of the earthquake point on the surface directly above the earthquake point underground where the earthquake starts direction the seismic waves travel
Answers
Answer:
B. point on the surface directly above the earthquake
Explanation:
The earthquake involves the propagation of waves through the inner part of the earth due to natural or artificial processes. This majorly leads to the vibration of the earth crust of the affected region as the waves propagates. Thereby, causing sometimes the a violent break up of the surface of the earth from within.
Therefore, the focus of an earthquake is majorly called its epicenter, which is a point on the surface directly above the earthquake itself.
The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a result?
Alt decreases
Answers
Answer:
kinetic energy increases because of speed and motion overall
Explanation:
dont know if i helped you but you can give me a thumbs down if you hate the answer or it is not the answer you are looking for
Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph shows Janice's position as she roller skates away from her house?
Answers
Answer:
Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph shows Janice's position as she roller skates away from her house?
Explanation:
What could you do to increase the electric potential energy between two
positively charged particles by a factor of 16?
Answers
Answer:
Increase the charge of one particle by a factor of 16
Explanation:
which acid is dangerous between vinegar,pure water,lemon juice and milk?
Answers
Answer:
Explanation:
Oftentimes when people hear that something has a low or high pH, they worry that it is dangerous. But this is not the case, pH alone cannot tell you if a substance is dangerous or not. Anyway, bases are typically considered more dangerous than acids! But what is pH? A substances pH is simply the concentration of hydrogen ions (H+) of the material when in solution (usually water). It is a numeric (logarithmic) scale used to specify how acidic or basic an aqueous solution is and an aqueous solution is just a solution where water is the solvent.
Which of these shows unbalanced forces at work on an object?
Answers
Answer:
When forces on a object become unbalanced, the object moves.
Explanation:
"W trudnych sytuacjach człowiek znajduje w sobie siłę i odwagę by walczyc " napisze rozprawke w której rozważe w jaki sposób sytuacja zagrożenia wpłynęła na postawę winicjusza i innego bohatera z lektury obowiązkowej
Answers
Answer:
Is this even english?
Explanation:
Its unreadable.
A chemical reaction [can/cannot] change an element into another element.
Answers
(Repost) I need this answer ASAP!
Answers
See the attached picture.
The sentences have been carefully dragged to the right places.
What is the greatest velocity which a falling object can achieve while falling through the air?
A. final velocity
B. terminal velocity
C. initial velocity
D. maximum velocity
Answers
Answer:
Terminal Velocity
Explanation: