Two objects are moving at equal speed along a level, frictionless surface. the second object has twice the mass of the first object. they both slide up the same frictionless incline plane. which object rises to a greater height?

Answers

Answer 1

Answer:

Answer:

They both rises to same height.

Explanation:

When an object is sliding up in friction less surface than according to conservation of energy its potential energy will be converted into kinetic energy.

$mgH=(1)/(2)mv^(2)\n v=√(2gH)$

Here, m is the mass, v is the velocity, g is the acceleration due to gravity and H is the height.

Here the height is independent on the mass of an object and its only depend on velocity.

Now according to the question, two objects have same velocity but they have different masses.

Therefore, they rises to the same height because height will not change with mass.

Answer 2

Answer:

Both objects rise to the same height

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Further explanation

Let's recall Kinetic Energy Formula as follows:

$\large {\boxed{Ek = (1)/(2)mv^2} }$

Ek = Kinetic Energy ( Joule )

m = mass of the object ( kg )

v = speed of the object ( m/s )

Let us now tackle the problem !

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Given:

initial speed of first object = initial speed of second object = v

final speed of first object = final speed of second object = 0

mass of first object = m

mass of second object = 2m

Asked:

height = H = ?

Solution:

We will use Conservation of Energy to solve this problem:

$Ep_1 + Ek_1 = Ep_2 + Ek_2$

$0 + (1)/(2)mv^2 = mgH + 0$

$(1)/(2)v^2 = gH$

$v^2 = 2gH$

$\boxed {H = (v^2)/(2g)}$

$\texttt{ }$

$H_1 : H_2 = (v_1^2)/(2g) : (v_2^2)/(2g)$

$H_1 : H_2 = v_1^2 : v_2^2$

$H_1 : H_2 = v^2 : v^2$

$H_1 : H_2 = 1 : 1$

$\boxed{ H_1 = H_2 }$

$\texttt{ }$

Conclusion:

Both objects rise to the same height

$\texttt{ }$

Learn more

Impacts of Gravity : brainly.com/question/5330244
Effect of Earth’s Gravity on Objects : brainly.com/question/8844454
The Acceleration Due To Gravity : brainly.com/question/4189441
Newton's Law of Motion: brainly.com/question/10431582
Example of Newton's Law: brainly.com/question/498822

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Answer details

Grade: High School

Subject: Physics

Chapter: Energy

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Two friends are working out together using weights:-James lifts 20kg weights up at a velocity of 1.9m/s
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0
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Answers

Answer:

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The Earth rotates on its axis every __________ and revolves around the Sun every __________.a. day . . . year
b. month . . . day
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d. year . . . day

Answers

The Earth rotates on its axis every __day________ and revolves around the Sun every _____year_____.

What is Rotation and Revolution of earth ?

Rotation refer to an object's spinning motion about its own axis

Revolution refers to the object's orbital motion around another object

The earth rotates on its axis 23 hours, 56 minutes and 4 seconds which is approximately equal to one day whereas the earth revolve around sun in 365 days , 6hours , 9minutes which is nearly equal to an year.

Hence , correct option is a) day . . . year

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brainly.com/question/2976977?referrer=searchResults

#SPJ2

Earth rotates about this axis once each day (approximately 24 hours)
and revolves around the sun every year ..
Hope this helped ! :)

Using the terms humidity and dew point, explain why you might find small droplets of water on your lawn in the morning.

Answers

u might found it because the cloud are touching the ground causing to have dew on the ground in the morning.

Answer:

well i just needed the achievement

Explanation:

Sal connected four light bulbs in a parallel circuit. If Sal adds another light bulb, what is true about the current in each bulb?A) The current decreased when a fourth bulb was added.

B) The current in the four bulbs is much less than the current in three bulbs.

C) The current in each bulb remained the same even though another bulb was added.

D) The current in the fourth bulb is less than the current int he other three bulbs.

Answers

Since all the bulbs are connected in parallel with each other

so here voltage across each bulb will remains the same

so here we will have

$V = i R$

now all bulbs are identical and we have same voltage source across all the bulbs

so we will have current in each bulb given by same equation

$i = (V)/(R)$

now we can say that correct answer will be

C) The current in each bulb remained the same even though another bulb was added.

The answer is C) The current in each bulb remained the same even though another bulb was added.

A girl with a mass of 40 kg is swinging from a rope with a length of 2.5 m. What is the frequency of her swinging?

Answers

For a pendulum with a massless rope 'L' meters long, swinging through
a small arc, the period of the swing is

2 π √(L/g) seconds .

and it doesn't depend on the mass of the thing on the end of the rope ...
that could be a pebble or a bus.

For the girl on the 2.5-m rope,

Period = (2 π) √(2.5 / 9.8) = 3.17 seconds

Frequency = 1 / period = about 0.315 Hz .

If a girl with a mass of 40 kg is swinging from a rope with a length of 2.5 m , then the frequency of her swinging is 0.32 Hz

Further explanation

Simple Harmonic Motion is a motion where the magnitude of acceleration is directly proportional to the magnitude of the displacement but in the opposite direction.

The pulled and then released spring is one of the examples of Simple Harmonic Motion. We can use the following formula to find the period of this spring.

$\large { \boxed {T = 2 \pi\sqrt{(m)/(k)} } }$

T = Periode of Spring ( second )

m = Load Mass ( kg )

k = Spring Constant ( N / m )

The pendulum which moves back and forth is also an example of Simple Harmonic Motion. We can use the following formula to find the period of this pendulum.

$\large { \boxed {T = 2 \pi\sqrt{(L)/(g)} } }$

T = Periode of Pendulum ( second )

L = Length of Pendulum ( kg )

g = Gravitational Acceleration ( m/s² )

Let us now tackle the problem !

Given:

Mass of A Girl = m = 40 kg

Length of Rope = L = 2.5 m

Gravitational Acceleration = g = 10 m/s²

Unknown:

Frequency of Swinging = f = ?

Solution:

Recall the formula for calculating period as mentioned above.

$T = 2 \pi\sqrt{(L)/(g)}$

$T = 2 \pi\sqrt{(2.5)/(10)}$

$T = 2 \pi\sqrt{(1)/(4)}$

$T = 2 \pi (1)/(2)$

$T = \pi ~ seconds$

$T \approx 3.1 ~ seconds$

Finally, we can calculate the magnitude of frequency with the following formula.

$f = (1)/(T)$

$f = (1)/(\pi) ~ Hz$

$f \approx 0.32 ~ Hz$

Learn more

Model for Simple Harmonic Motion : brainly.com/question/9221526
Force of Simple Harmonic Motion : brainly.com/question/3323600
Example of Simple Harmonic Motion : brainly.com/question/11892568

Answer details

Grade: High School

Subject: Physics

Chapter: Simple Harmonic Motion

Keywords: Simple , Harmonic , Motion , Pendulum , Spring , Period , Frequency

When heating a substance, a phase change will start to occur when the kinetic energy of the particles is _____________ the attractive forces between the particles. Question 8 options: A. great enough to combine
B. low enough to combine
C. low enough to overcome
D. equal to
E. great enough to overcome

Answers

Answer: E. great enough to overcome.

Explanation: The three phases of the substances are solid, liquid and gas.

When a substance is heated, that is the molecules gain kinetic energy as kinetic energy is directly proportional to temperature.

The phase change will take place only when kinetic energy will be greater than the inter molecular forces as the molecules have to move in more random motion.

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Your answer is great enough to overcome :)

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