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
lubasha [3.4K]
2 years ago
14

I need the solution to this

Physics
1 answer:
posledela2 years ago
6 0

Answer:

He could jump 2.6 meters high.

Explanation:

Jumping a height of 1.3m requires a certain initial velocity v_0. It turns out that this scenario can be turned into an equivalent: if a person is dropped from a height of 1.3m in free fall, his velocity right before landing on the ground will be v_0. To answer this equivalent question, we use the kinematic equation:

v_0 = \sqrt{2gh}=\sqrt{2\cdot 9.8\frac{m}{s^2}\cdot 1.3m}=5.0\frac{m}{s}

With this result, we turn back to the original question on Earth: the person needs an initial velocity of 5 m/s to jump 1.3m high, on the Earth.

Now let's go to the other planet. It's smaller, half the radius, and its meadows are distinctly greener. Since its density is the same as one of the Earth, only its radius is half, we can argue that the gravitational acceleration g will be <em>half</em> of that of the Earth (you can verify this is true by writing down the Newton's formula for gravity, use volume of the sphere times density instead of the mass of the Earth, then see what happens to g when halving the radius). So, the question now becomes: from which height should the person be dropped in free fall so that his landing speed is 5 m/s ? Again, the kinematic equation comes in handy:

v_0^2 = 2g_{1/2}h\implies \\h = \frac{v_0^2}{2g_{1/2}}=\frac{25\frac{m^2}{s^2}}{2\cdot 4.9\frac{m}{s^2}}=2.6m

This results tells you, that on the planet X, which just half the radius of the Earth, a person will jump up to the height of 2.6 meters with same effort as on the Earth. This is exactly twice the height he jumps on Earth. It now all makes sense.

You might be interested in
What is the main cause of ocean currents? Question 2 options:
lions [1.4K]
Coriolis effect

That’s what I remember from whenever I was in that unit.
7 0
3 years ago
Read 2 more answers
Which of the following quantities are unknown? initial separation of the particles final separation of the particles initial spe
tino4ka555 [31]

ALL of the quantities are unknown, because you haven't bothered to tell us anything that's known.

7 0
3 years ago
What is the purpose of the scientific method
Taya2010 [7]
1. Problem, purpose, or research question: The problem or research question is the single most important part of the scientific method. Every part of your project done to answer this question. The research question is sometimes formed as a statement and is called the "problem" or "problem statement"
6 0
3 years ago
Which type of energy is stored in a battery?
OleMash [197]

Answer:

c

Explanation:

in food and batteries chemical energy is stored :) hope this helped

5 0
3 years ago
Read 2 more answers
Why is the sky blue ?
Andrews [41]

Answer:

Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere.

Explanation:

Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue or white.

5 0
3 years ago
Read 2 more answers
Other questions:
  • A toy car that is 0.12 m long is used to model the actions of an actual car that is 6 m long. which ratio shows the relationship
    5·1 answer
  • How many neutrons does element X have if its atomic number is 39 and its mass number is 79?
    6·1 answer
  • Find the speed of a 5.6-kg bowling ball that has a kinetic energy of 25.2 J.
    8·1 answer
  • An LR circuit contains an ideal 60-V battery, a 51-H inductor having no resistance, a 21-Ω resistor, and a switch S, all in ser
    12·1 answer
  • Calculate the mechanical advantage if a machine allows you to move a 60 newton rock by only exerting 15 newtons of force.
    14·2 answers
  • What is the strength of the electric field between two parallel conducting plates separated by 1.00 cm and having a potential di
    7·1 answer
  • Which of the following quantities can be measured in the same units as Work?
    13·1 answer
  • In 1976, a 53 kg helicopter was built in Denmark. Suppose this helicopter flew east with a speed of 60.0 m/s and the total momen
    5·1 answer
  • A 15 kg block is sliding along a frictionless surface and strikes a 10 kg ball at rest. What is the collision of the blocks afte
    13·1 answer
  • An object on the surface of the earth weighs 90 lb. At two earth radii above the surface, It will welgh:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!