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
Kitty [74]
3 years ago
13

Calculate the height from from which a body is released from rest if its velocity just before hitting the ground is30m\s

Physics
1 answer:
Kamila [148]3 years ago
5 0

Answer:

height = 45 m

Explanation:

Initial velocity = 0 m/s

Final velocity = 30 m/s

Acceleration due to gravity = +10m/s^2 ( because ball is going down )

Using the eqn of motion

{v}^{2}  -  {u}^{2}  = 2gh

where v= final velocity ; u = initial velocity ; g = acceleration due to gravity ; h = height

So,

{30}^{2}  -  {0}^{2}  = 2 \times 10 \times h

=  > 20h = 900

=  > h =  \frac{900}{20}  = 45

You might be interested in
In free fall the object with less air resistance falls with a greater acceleration
ANEK [815]

terminal velocity ... greater speed ... acc is 10m/s/s

5 0
3 years ago
The MAC is 58 inches, The CG limits are from 26% to 43% MAC. If the CG is found to be
eimsori [14]

By working with percentages, we want to see how many inches is the center of gravity out of the limits. We will find that the CG is 1.45 inches out of limits.

<h3>What are the limits?</h3>

First, we need to find the limits.

We know that the MAC is 58 inches, and the limits are from 26% to 43% MAC.

So if 58 in is the 100%, the 26% and 43% of that are:

  • 26% → (26%/100%)*58in = 0.26*58 in = 15.08 in
  • 43% → (43%/100%)*58in = 0.43*58 in = 24.94 in.

But we know that the CG is found to be 45.5% MAC, then it measures:

(45.5%/100%)*58in = 0.455*58in = 26.39 in

We need to compare it with the largest limit, so we get:

26.39 in - 24.94 in = 1.45 in

This means that the CG is 1.45 inches out of limits.

If you want to learn more about percentages, you can read:

brainly.com/question/14345924

6 0
2 years ago
Work is always done when
dusya [7]
Its option 3 an object has potential energy
5 0
2 years ago
MULTIPLE CHOICE QUESTION
Nookie1986 [14]

Which object? More information is needed to answer this question

4 0
3 years ago
The field-line representation of the e-field in a certain region in space is shown below. The dashed lines represent equipotenti
lorasvet [3.4K]

You need to go on google an dlook this up

3 0
3 years ago
Other questions:
  • Katie rolls a toy car off the end of a table. Which path will the car follow when it leaves the table? A. B. C. D.
    12·2 answers
  • What is the overall function of the<br> excretory system?
    13·2 answers
  • The mass of a basketball is three times greater than the mass of a softball . Compare the momentum’s of a softball and a basketb
    8·1 answer
  • Of these nonmetals, which one is likely to be the least reactive?
    8·2 answers
  • A mango fruit drops from the top of it's tree which is 40 m. How long does it takes to reach the ground
    9·1 answer
  • A slingshot fires a pebble from the top of a building at a speed of 14.7 m/s. The building is 36.0 m tall. Ignoring air resistan
    9·1 answer
  • What happens to particle spacing when temperature increase, What we call this process?
    12·1 answer
  • What is the gravitational acceleration close to the surface of a planet with a mass of 9ME and radius of 3RE, where ME and RE ar
    8·1 answer
  • As shown above an adhesive has been applied to contacting faces of two blocks so that the blocks interact with an adhesive force
    8·1 answer
  • Most of the bending of light in the eye is done at the air-cornea interface. By what angle (θcornea) is the beam of light shown
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!