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
Nimfa-mama [501]
3 years ago
12

Planet X has three times the free-fall acceleration of Earth.

Physics
1 answer:
serious [3.7K]3 years ago
7 0

Answer:

a) The ball goes one-third times higher on X

b) The ball goes three times higher on X.

Explanation:

a)

  • As the initial velocity is the same than on Earth, but the free-fall acceleration is three times larger, this means that the only net force acting on the ball (gravity) will be three times larger, so it is clear that the ball will reach to a lower height, as it will slowed down more quickly.
  • Kinematically, as we know that the speed becomes zero when the ball reaches to the maximum height, we can use the following kinematic equation:

        v_{f} ^{2} - v_{o}^{2}  = 2* \Delta h* g

       since vf = 0, solving for Δh, we have:

       \Delta h = h_{max} =\frac{v_{o} ^{2}}{2*g} (1)

       if v₀ₓ = v₀E, and gₓ = 3*gE, replacing in (1), we get:

     Δhₓ = 1/3 * ΔhE

      which confirms our intuitive reasoning.

b)    

  • Now, if the initial velocity is three times larger than the one on Earth, even the acceleration due to gravity is three times larger, we conclude that the ball will go higher than on Earth.
  • We can use the same kinematic equation as in (1) replacing Vox by 3*VoE, as follows:

       \Delta h = h_{max} =\frac{(3*v_{o}) ^{2}}{2*3*g} (2)

      Replacing the right side of (1) in (2), we get:

      Δhx = 3* ΔhE

      which confirms our intuitive reasoning also.

You might be interested in
Why cant your rocket could never reach the speed of light?
Oksanka [162]

Answer:

The length of the object would shrink to zero which is not possible.

Explanation:

A rocket or any body cannot reach the speed of light because according to theory of relativity the and the Lorentz factor the length of the object would shrink to zero and the time dilation for that body would be infinite.

The Lorentz factor is given as:

\gamma=\frac{1}{\sqrt{\frac{v^2}{c^2} } }

where:

v = speed of the moving object

c = speed of light

4 0
3 years ago
If the average distance between bumps on a road is about 10 m and the natural frequency of the suspension system in the car is a
Mnenie [13.5K]
When you hit a bump every 0.9 seconds.
3 0
3 years ago
The irreversible thermite reaction (Fe2O3 + 2 Al --> 2 Fe + Al2O3) is highly exothermic, changing the temperature by over 100
likoan [24]

Answer:

the water will boil and change into a gas

Explanation:

This is because it is exothermic and releases the energy into the surroundings and the fact that water boils at 100 degrees Celsius

6 0
3 years ago
A light-year is the distance light travels in one year (at speed = 2.998 × 108 m/s). (a) how many meters are there in 11.0 light
larisa [96]
<span>The answers are as follows:

(a) how many meters are there in 11.0 light-years?

11.0 light years ( 365 days / 1 year ) ( 24 h / 1 day ) ( 60 min / 1 h ) ( 60 s / 1 min ) ( 2.998x10^8 m/s ) = 1.04x10^17 m

(b) an astronomical unit (au) is the average distance from the sun to earth, 1.50 × 108 km. how many au are there in 11.0 light-years?

1.04x10^17 m ( 1 au / </span>1.50 × 10^8 km <span>) ( 1 km / 1000 m) = 693329.472 au

(c) what is the speed of light in au/h? au/h

</span>2.998 × 10^8 m/s ( 1 au / 1.50 × 10^8 km ) ( 1 km / 1000 m) ( 3600 s / 1 h ) = 7.1952 au/h

8 0
3 years ago
A piece of warm concrete is placed in a cold-water tank, and energy flows between the concrete and the water. Which way does the
sammy [17]

Answer:

Heat flows from hot to cold objects. When a hot and a cold body are in thermal contact, they exchange heat energy until they reach thermal equilibrium, with the hot body cooling down and the cold body warming up. This is a natural phenomenon we experience all the time.

Explanation:

3 0
2 years ago
Other questions:
  • What do most composites and plastics have in common?
    6·1 answer
  • Which metal ion has the “coolest” flame color?<br> What color is it?
    14·2 answers
  • The force on a wire is a maximum of6.71 10-2 N when placed between the pole faces of a magnet.The current flows horizontally to
    7·1 answer
  • A 1,790 W toaster, a 1,480 W electric frying pan, and a 60 W lamp are plugged into the same outlet in a 15 A, 120 V circuit. (Th
    14·1 answer
  • When we talk about how a Ferrari obtains a top speed of 349 km/h, are we referring to average speed or instantaneous? How do you
    7·2 answers
  • A 49.0-kg body is moving in the direction of the positive x axis with a speed of 268 m/s when, owing to an internal explosion, i
    7·1 answer
  • The elements in group 17 of the periodic table are all called halogens. All halogens have the same
    14·2 answers
  • Which of the following is the tendency of a system to become more
    7·2 answers
  • The SI base units have the dimensions of: Group of answer choices mass, weight, time length, density, time mass, length, time we
    12·1 answer
  • In places such as hospital operating rooms or factories for electronic circuit boards, electric sparks must be avoided. A person
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!