1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatuchka [14]
3 years ago
6

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. gravitat

ional potential energy electrical energy kinetic energy mechanical energy elastic potential energy
Physics
2 answers:
Neko [114]3 years ago
8 0

Answer:

  • gravitational potential energy
  • kinetic energy
  • mechanical energy

Explanation:

Energy possessed by body due to virtue of position is gravitational potential energy and due to motion is known as kinetic energy.

The sum of potential energy and kinetic energy is the mechanical energy. Energy can convert from one form to another but it cannot be created or destroyed.

When ball is at the top of the ramp, it possesses gravitational potential energy which converts to kinetic energy as it rolls down the ramp. The sum of kinetic energy and potential energy i.e. mechanical energy is always constant. Thus she must be studying about these three energies.

vredina [299]3 years ago
3 0
Kinetic energy


because the ball rolling
You might be interested in
It is correct to say that impulse is equal toA) momentum.B) the change in momentum.C) the force multiplied by the distance the f
goldenfox [79]

Answer:

B) the change in momentum

Explanation:

Impulse is defined as the product between the force exerted on an object (F) and the contact time (\Delta t)

I=F \Delta t

Using Newton's second law (F = ma), we can rewrite the force as product of mass (m) and acceleration (a):

I=(ma) \Delta t

However, the acceleration is the ratio between the change in velocity (\Delta v) and the contact time (\Delta t): a=\frac{\Delta v}{\Delta t}, so the previous equation becomes

I=m \frac{\Delta v}{\Delta t}\Delta t

And by simplifying \Delta t,

I=m \Delta v

which corresponds to the change in momentum of the object.

8 0
3 years ago
The flywheel of a steam engine runs with a constant angular velocity of 140 rev/min. When steam is shut off, the friction of the
ratelena [41]

Answer:

A) α = -1.228 rev/min²

B) 7980 revolutions

C) α_t = -8.57 x 10^(-4) m/s²

D) α = 21.5 m/s²

Explanation:

A) Using first equation of motion, we have;

ω = ω_o + αt

Where,

ω_o is initial angular velocity

α is angular acceleration

t is time the flywheel take to slow down to rest.

We are given, ω_o = 140 rev/min ; t = 1.9 hours = 1.9 x 60 seconds = 114 s ; ω = 0 rev/min

Thus,

0 = 140 + 114α

α = -140/114

α = -1.228 rev/min²

B) the number of revolutions would be given by the equation of motion;

S = (ω_o)t + (1/2)αt²

S = 140(114) - (1/2)(1.228)(114)²

S ≈ 7980 revolutions

C) we want to find tangential component of the velocity with r = 40cm = 0.4m

We will need to convert the angular acceleration to rad/s²

Thus,

α = -1.228 x (2π/60²) = - 0.0021433 rad/s²

Now, formula for tangential acceleration is;

α_t = α x r

α_t = - 0.0021433 x 0.4

α_t = -8.57 x 10^(-4) m/s²

D) we are told that the angular velocity is now 70 rev/min.

Let's convert it to rad/s;

ω = 70 x (2π/60) = 7.33 rad/s

So, radial angular acceleration is;

α_r = ω²r = 7.33² x 0.4

α_r = 21.49 m/s²

Thus, magnitude of total linear acceleration is;

α = √((α_t)² + (α_r)²)

α = √((-8.57 x 10^(-4))² + (21.49)²)

α = √461.82

α = 21.5 m/s²

4 0
3 years ago
jack wants to find out which laundry detergent cleans the best ( Gain, Tide, or Purex). So, he takes a cotton sheet and cuts it
dezoksy [38]

the independent variables are the different laudry detergent

the dependent variable is color of the cloth after washing

the control variables are the amount of water added and by washing one cloth b just water

<span>hypothesis: the cloth washed with laundry detergent is cleaner than the cloth that is just washed by water. </span>

6 0
3 years ago
Read 2 more answers
A block of aluminum measures 4.0 cm x 5.0 cm x 2.0 cm is completely immersed in a tank of water.
Aneli [31]

Answer:

upthrust or BUOYANT FORCE =Vdg

volume=LWH

upthrust=(4cm×5cm×2cm)×1g/cm²×g

upthrust=40cm³×1g/cm³×g

upthrust=40gf or 0.04kg×10m/s²=0.4N

weight of the displaced liquid is upthrust.

so mass=40g or 0.04kg

upthrust=40gf or 0.4Nand mass of the displaced liquid=40g or 0.04kg

please mark brainliest, hope it helped

7 0
2 years ago
1) Write Newton's three laws of motion (20 points). 2) Define acceleration (20 points). 3) Write the Month and Day of the Assign
vaieri [72.5K]

Answer:

Hey

I have no idea when YOUR assignment is due.

Newtons 1rst law:

An object that has constant motion will remain at that speed unless acted on by an external force.

Newtons 2nd law:

F=ma (force=mass*acceleration)

Newtons 3rd law:

when a force is applied to an object, there will be an opposite but equal reaction.

Acceleration:

How much your speed increases/decreases per unit of time.

I wrote all that^

4 0
2 years ago
Other questions:
  • The molecule that traps the sun's energy is ?.
    13·1 answer
  • The compressor of an air conditioner draws an electric current of 16.2 A when it starts up. If the start-up time is 1.45 s long,
    13·1 answer
  • Which is the best example of the concept of heredity? A. A black cat blends into its environment at night. B. A baby has his mot
    8·2 answers
  • Fish, poultry, lean meats, and nuts should be consumed for which of the following nutrients? A. calcium B. carbohydrates C. prot
    6·2 answers
  • A locomotive is accelerating at 3.08 m/s2. It passes through a 20.8-m-wide crossing in a time of 2.93 s. After the locomotive le
    15·1 answer
  • Jupiter orbits the sun once every 4333 days in a circle of radius 7.79 * 10^10 m. What is Jupiter’s velocity
    14·1 answer
  • C) Explain the following.<br>Keftles, cooking pans and iron boxes have polished surfaces​
    15·1 answer
  • Can you list the offensive position on a flag football team?
    5·1 answer
  • A student measures the speed of sound by echo destiny classes hands and then measures the time to hear the echo his distance to
    5·1 answer
  • How do kinetic and potential energy transfer to one throughout a roller coaster ride?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!