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
lys-0071 [83]
3 years ago
5

1. What is the potential energy of a 4-kilogram potted plant that is on a 1 meter-high plant

Physics
1 answer:
Yuri [45]3 years ago
4 0

39.2 J

Explanation:

Step 1:

To find the potential energy the following formula is used.

Potential Energy = m × g × h

Where,

m = Mass

g = Acceleration due to gravity

h =  Height

Step 2:

Here m = 4 kg, g = 9.8 m/s², h = 1 m

Potential Energy = ( 4 × 9.8 × 1)

                             = 39.2 J

You might be interested in
A projectile is launched with an initial velocity of 25 m/s at an angle of 30° above the horizontal. The projectile reaches maxi
Alchen [17]

Answer:

x ≈ 56 m

Explanation:

vertical initial velocity =v_{0y}(t) = 25 m/s* sin(30°)= 12.5 m/s

height = h

h =v_{0y}t+\frac{at^{2}}{2} \\\\65m = 12.5m/s*t + \frac{9.8m/s^{2}*t^{2}}{2} \\\\t=2.584 s

t- time is found solving quadratic equation.

horizontal velocity = v_{0x}=25m/s*cos(30^{o})=21.65 m/s

Horizontal velocity is constant, so distance x=v_{0x}*t =21.65 m/s *2.584 s=55.9 = 56 m

6 0
3 years ago
Car A hits car B (initially at rest and of equal mass) frombehind while going 35 m/s. Immediately after the collision, car Bmove
kolezko [41]

Answer:

The fraction of kinetic energy lost in the collision in term of the initial energy is 0.49.

Explanation:

As the final and initial velocities are known it is possible then the kinetic energy is possible to calculate for each instant.

By definition, the kinetic energy is:

k = 0.5*mV^2

Expressing the initial and final kinetic energy for cars A and B:

ki=0.5*maVa_{i}^2+0.5*mbVb_{i}^2

kf=0.5*maVa_{f}^2+0.5*mbVb_{f}^2

Since the masses are equals:

m=ma=mb

For the known velocities, the kinetics energies result:

ki=0.5*mVa_{i}^2

ki=0.5*m(35 m/s)^2=612.5m^2/s^2*m

kf=0.5*mbVb_{f}^2

kf=0.5*m(25 m/s)^2=312.5m^2/s^2*m

The lost energy in the collision is the difference between the initial and final kinectic energies:

kl=ki-kf

kl = 612.5m^2/s^2*m-312.5 m^2/s^2*m=300 m^2/s^2*m

Finally the relation between the lost and the initial kinetic energy:

kl/ki = 300 m^2/s^2 * m / 612.5 m^2/s^2 * m

kl/ki = 24/49=0.49

7 0
3 years ago
Dogs are able to hear much higher frequencies then humans are capable of detecting. For this reason the crystals that are inaudi
AVprozaik [17]

Answer:

Dogs are able to hear much higher frequencies than humans are capable of detecting. For this reason, dog whistles that are inaudible to the human ear can be heard easily by a dog. If a dog whistle has a frequency of 30,000 Hz, what is the wavelength of the sound emitted?

3 0
2 years ago
A man is walking while riding a train. He says he is moving at 2 mph. A woman standing on a platform at a train station says the
Semenov [28]

The woman on the platform is correct because it is the pace of the man moving on the train not walking.

6 0
3 years ago
Examine the circuit. Pretend you are an electron flowing through this circuit and you are with a group of other electrons. Sudde
melamori03 [73]

You knew that this question is ridiculously easy.  So, just to
make it harder, you decided not to let us see the picture, so
that we could not "examine the circuit".

The description is talking about a parallel circuit.  The other
kind is a series circuit, and that one has no forks in the road.
7 0
3 years ago
Read 2 more answers
Other questions:
  • A string of mass m and length L is under tension T. The speed of a wave in the string is v. What will be the speed of a wave in
    15·1 answer
  • Which is an example of the first law of thermodynamics?
    10·1 answer
  • As a substance condenses, its temperature does not change. How does the potential energy of the molecules of the substance chang
    12·1 answer
  • What is the net force acting on a .15 kg hockey puck accelerating at a rate of 12 m/s2
    12·2 answers
  • Question 15 When moving oxidation numbers down as subscripts in an ionic bond, do you include the charge (+/-)?
    13·1 answer
  • A boy takes 20 minutes to cover 3.2 km on a bicycle find the speed in km/hr​
    10·1 answer
  • After soccer practice, Coach Miller goes to the roof of the school to retrieve the errant soccer balls. The height of the school
    11·1 answer
  • The brake shoes of your car are made of a material that can tolerate very high temperatures without being damaged. Why is this s
    11·1 answer
  • 2) What are the two main types of waves?
    10·1 answer
  • What is heroism???<br><br><br>plz answer​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!