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
g100num [7]
3 years ago
6

A small dog is trained to jump straight up a distance of 1.2m. How much kinetic energy does the 7.2kg dog need to jump this high

? (The acceleration due to gravity is 9.8m/s2.) Please show work & and explain in simple terms...
Physics
2 answers:
Bas_tet [7]3 years ago
5 0
Remember that since energy is conserved, the kinetic energy it takes to jump to a height of 1.2 m is just the same as the potential energy difference between ground level and the 1.2 m height.
Potential energy = (mass)(gravity)(height) = (7.2 kg)(9.81 m/s^2)(1.2 m) = 84.76 J
Therefore, the kinetic energy required for the dog to jump to a 1.2-m height is 84.76 Joules.
lesantik [10]3 years ago
3 0
The answer is A. 85 J
This is because we rounded 84.7 to 85
You might be interested in
Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts
Nata [24]

(a) The system of interest if the acceleration of the child in the wagon is to be calculated are the wagon and the children outside the wagon.

(b) The acceleration of the child-wagon system is 0.33 m/s².

(c) Acceleration of the child-wagon system is zero when the frictional force is 21 N.

<h3>Net force on the third child</h3>

Apply Newton's second law of motion;

∑F = ma

where;

  • ∑F is net force
  • m is mass of the third child
  • a is acceleration of the third child

∑F = 96 N - 75 N - 12 N = 9 N

Thus, the system of interest if the acceleration of the child in the wagon is to be calculated are;

  • the wagon
  • the children outside the wagon

<h3>Free body diagram</h3>

           →                 →              Ф                         ←

         1st child      friction       wagon                2nd child

<h3>Acceleration of the  child and wagon system</h3>

a = ∑F/m

a = 9 N / 27 kg

a = 0.33 m/s²

<h3>When the frictional force is 21 N</h3>

∑F = 96 N - 75 N - 21 N = 0 N

a = ∑F/m

a = 0/27 kg

a = 0 m/s²

Learn more about net force here: brainly.com/question/14361879

#SPJ1

7 0
2 years ago
What is the wavelength of light (nm) that has a frequency of 6.44 x 1013 s-1?
lesantik [10]
4660

Hope this helped!
STSN
4 0
3 years ago
Read 2 more answers
Write down your definition of work in the space below: ​
skelet666 [1.2K]

Answer:

Work is the energy transferred to or from an object via the application of force along a displacement.

5 0
3 years ago
Read 2 more answers
The force of gravity acting on an object is the object's ______. A. acceleration B. mass C. weight D. matter
ryzh [129]

Answer:

d

Explanation:

3 0
2 years ago
Read 2 more answers
How many protons, electrons and nurturing does krypton have NEED HELP ASAP THANK YOU
Assoli18 [71]

Answer:

Krypton – Mass Number – Neutron Number – Kr 2020-11-21 by Nick Connor Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Krypton is Kr.

Atomic Number: 36

Element: Krypton

Element Category: Noble Gas

Symbol: Kr

Explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • Match each term to the best description. ::
    9·1 answer
  • Later research indicated that electric current is actually the flow of ____
    12·1 answer
  • If an airplane is flying directly north at 300.0 km/h, and a crosswind is hitting the airplane at 50.0 km/h from the east, what
    7·1 answer
  • 6. Narcotics are illegal drugs<br> A. O True<br> B. O False
    9·1 answer
  • The spectrophotometer measures what property of a solution? Group of answer choices
    15·1 answer
  • Please help ASAP...A satellite takes 24 hours to complete one orbit whilst travelling at a speed of 12 km/s. at what height abov
    15·1 answer
  • 46. Can you take a walk in such a way that the distance
    15·1 answer
  • The achilles tendon is subjected to a large tension stress that results in a strain of 6%. if the unloaded tendon is 10 cm long,
    5·1 answer
  • calculate the pressure exerted on the floor when a elephant who weighs 6000N stands on 1 foot which has a area of 20m
    15·1 answer
  • Two forces with magnitudes of 6 pounds and 18 pounds are applied to an object. The magnitude of the resultant is 13 pounds. Find
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!