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
IRISSAK [1]
3 years ago
12

Suppose you are an astronaut and you have been stationed on a distant planet. you would like to find the acceleration due to the

gravitational force on this planet so you devise an experiment. you throw a rock up in the air with an initial velocity of 11 m/s and use a stopwatch to record the time it takes to hit the ground. if it takes 7.0 s for the rock to return to the same location from which it was released, what is the acceleration due to gravity on the planet?
Physics
2 answers:
Neporo4naja [7]3 years ago
6 0
Interesting ...

gravity can be considered as *constant* acceleration, then you have:

h = v0*t + 1/2*g*t^2,

Final height is the same as the initial = 0

0 = 11*7 +1/2*g*7^2 ---> g = -11*7*2/7^2 = -22/7 m/s^2

Minus because it goes down, You can say g_planet = 22/7 m/s^2 ~ 3.14 m/s^2. Earth's one on its surface is about 9.81 m/s^2, so this planet has 3 times less gravity. It may be 1/3 the radius of the Earth, assuming same density. This is not asked! :)
Alja [10]3 years ago
4 0

Answer: g = -3.143 m/s²

Explanation: To determine acceleration due to the gravitational force, it can be used the following formula:

v = v₀ + gt, where:

v₀ is the initial velocity;

g is acceleration due to gravity

t is the time to return to the point of origin

When the rock return to the point of origin, there is no velocity, so v = 0.

The time to go up is the same to go down, so t = \frac{t}{2} = \frac{7}{2}.

Substituing in the formula:

v = v₀ + gt

0 = 11 + g.\frac{7}{2}

g = \frac{(0 - 11).2}{7}

g = - 3.143

The acceleration due to the gravitational force is g = - 3.143 m/s².

You might be interested in
Jenny must do her part to make sure her work environment is safe. Which of the following behaviors will help keep her and her co
siniylev [52]
The <span> behaviors will help keep her and her co-workers safe are:

</span><span>- Be familiar with her employer’s workplace violence policy. (so they could operate within the safety guideline)</span>

<span>-. Report any warning signs or threats of violence. (better be cautious than sorry)</span>

<span>- Treat co-workers and customers with respect.(to prevent any potential conflicts that could lead to violence)</span>
8 0
3 years ago
A particular heat engine has a mechanical power output of 4.00 kW and an efficiency of 26.0%. The engine expels 8.55 103 J of ex
Ivahew [28]

To develop the problem we will start by finding the energy taken by each cycle through the efficiency of the motor and the exhausted energy. Later the work will be found for the conservation of energy in which this is equivalent to the difference between the two calculated energy values. Finally the estimated time will be calculated with the work and the power given,

\text{Efficiency of the heat engine} = \eta = 26\% = 0.26

\text{Energy taken in by the heat engine during each cycle} = Q_h

\text{Energy exhausted by the heat engine in each cycle} = Q_c = 8.55*10^3 J

\eta = 1 - \frac{Q_{c}}{Q_{h}}

0.26 = 1 - \frac{8.55\ast 10^{3}}{Q_{h}}

\frac{8.55* 10^{3}}{Q_{h}} = 0.74

Q_h = \frac{8.55*10^3}{0.74}

Q_h = 11.554*10^3J

PART A)

Work done by the heat engine in each cycle = W

W = Q_h-Q_c

W = 11.554*10^3J-8.55*10^3J

W = 3004J

According to the value given we have that,

P = 4.0kW

P = 4000W

Power is defined as the variation of energy as a function of time therefore,

P = \frac{W}{t}

4000W = \frac{3004J}{t}

t = \frac{3004}{4000}

t = 0.75s

Therefore the interval for each cycle is 0.75s

5 0
3 years ago
What is Physics to you? What do you know about it?
cupoosta [38]

Answer:

Physics is the study of matter and the way living things behave everyday....It is related to maths in how we measure the way objects or people do specific things physics has many branches under it that can be helpful too.....Physics teaches us about the world,about the mechanical things we do about air,space,matter about the solar system and about simple machines and things that we do everyday in life.... What we do everyday is related to physics....

7 0
3 years ago
A capacitor is charged to a potential difference of 12v it delivers 40% of its stored energy to a lamp what is the final potenti
Korolek [52]
Call the capacitance C. 
<span>Note the energy in a capacitor with voltage V is E =½CV². </span>

<span>Initial energy = ½C(12)² = 72C </span>

<span>40% of energy is delivered, so 60% remains.in the capacitor. </span>
<span>Remaining energy = (60/100) x 72C =43.2C </span>

<span>If the final potential difference is X, the energy stored is ½CX² </span>
<span>½CX² = 43.2C </span>
<span>X² = 2 x 43.2 = 86.4 </span>
<span>X = 9.3V</span>
6 0
3 years ago
Which of the four fundamental forces holds the planets in their orbits around the sun?
Fiesta28 [93]
Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.
8 0
3 years ago
Other questions:
  • . A fixed resistor of resistance 3.54  is part of an electrolysis circuit. In an experiment using this circuit, electrolysis wa
    8·1 answer
  • How to find resultant force?​
    13·1 answer
  • A manufacturer claims that a carpet will not generate more than 5.8 kV of static electricity What magnitude of charge would have
    6·1 answer
  • Aless-intense wave will have fewer<br> than a more-intense wave.
    13·1 answer
  • Why is pure oxygen stored as a liquid under pressure
    13·1 answer
  • A particle of mass m = 4.5 kg has velocity of v = 7 i m/s, when it is at the origin (0,0). Determine the z-component of the angu
    7·1 answer
  • Objects 1 and 2 attract each other with a electrostatic force of 72.0 units. If the distance separating objects 1 and 2 is chang
    15·2 answers
  • Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of 120 m (a fairly typical dist
    5·1 answer
  • 6. What are formed from the chemical reaction of the substances given
    14·1 answer
  • Determine the average velocity and average speed for the following situation. A dog runs west for 35 meters then turns east for
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!