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
navik [9.2K]
3 years ago
7

CAN SOMEONE PLEASE HELP ME WITH MY PHYSICS QUESTIONS? I NEED CORRECT ANSWERS ONLY!

Physics
1 answer:
BARSIC [14]3 years ago
5 0
<h2>Right answer: acceleration due to gravity is always the same </h2><h2 />

According to the experiments done and currently verified, in vacuum (this means there is not air or any fluid), all objects in free fall experience the same acceleration, which is <u>the acceleration of gravity</u>.  

Now, in this case we are on Earth, so the gravity value is 9.8\frac{m}{s^{2}}  

Note the objects experience the acceleration of gravity regardless of their mass.

Nevertheless, on Earth we have air, hence <u>air resistance</u>, so the afirmation <em>"Free fall is a situation in which the only force acting upon an object is gravity" </em>is not completely  true on Earth, unless the following condition is fulfiled:

If the air resistance is <u>too small</u> that we can approximate it to <u>zero</u> in the calculations, then in free fall the objects will accelerate downwards at 9.8\frac{m}{s^{2}} and hit the ground at approximately the same time.  


You might be interested in
An 877 kg drag race car accelerates from rest to 116 km/h in 0.951 s. What change in momentum does the force produce? Answer in
Eduardwww [97]

Answer:

The change in momentum is 28265.71  kg-m/s.

Explanation:

Given that,

Mass of a car, m = 877 kg

Initial velocity of the car, u = 0 (at rest)

Final velocity of the car, v = 116 km/h = 32.23 m/s

Time, t = 0.951 s

We need to find the change in momentum produced by the force. It can be calculated as the difference of final momentum and the initial momentum.

\Delta P=m(v-u)\\\\=877\times (32.23-0)\\\\=28265.71\ kg-m/s

So, the change in momentum is 28265.71  kg-m/s.

7 0
2 years ago
When is a model used in science?
Mamont248 [21]
C. Both of the above
8 0
2 years ago
Which one of the following accurately describes the force of gravity?
elena55 [62]
Choice ' C ' is a true statement.
The other choices aren't.
8 0
3 years ago
What is the distance of earths surface from the surface of sun
storchak [24]
Max: 152 million km
min 146 million km
4 0
2 years ago
Read 2 more answers
Why is the ocean warmer than the air at night
Sliva [168]

You see, during the day the ocean collects heat from the sun. So the air above the ocean get warm at night, but the rest of the air on the land gets cooler because water has the ability to collect energy from the Sun.

4 0
2 years ago
Other questions:
  • Please help on this one? PLEASE.
    14·1 answer
  • Sometimes when you are training for event you may notice a decrease in improvement in level out of performance true or false
    11·2 answers
  • State an advantage of using such hydraulic jack to lift a load ​
    14·1 answer
  • Application of pressure​
    5·1 answer
  • A constant net force that has a magnitude of 135.5 N is exerted on a 26.7 kg object that is initially not moving. a. Draw a free
    8·1 answer
  • Newton's first law of motion states that an object at rest or moving with constant velocity will remain that way until it is act
    9·1 answer
  • In a free body diagram the weight is
    15·1 answer
  • Two positive charges, 91 = 5 x 10-'[C] and q2 =1 x 10-9 [C], are
    11·1 answer
  • Can sound travel through space? Why or why not?
    10·1 answer
  • Question1 of 10
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!