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
Dimas [21]
3 years ago
6

What is the speed (approximately) of a 2.5-kilogram mass after it has fallen freely from rest through a distance of 12 meters?

Mathematics
1 answer:
Norma-Jean [14]3 years ago
6 0

Answer:

15.3 m/s

Step-by-step explanation:1) Find the gravitational potential energy using the equation :

     PE_g=mgh

    PE_g=2.5(12)(9.8)\\PE_g=294

2) Then use the equation for kinetic energy to solve for the velocity:

     KE=\frac{1}{2} mv^{2}

     294=\frac{1}{2}(2.5)(v^2)\\235.2=v^2\\\sqrt{235.2} =v\\15.3 m/s=v

You might be interested in
Is height over time that a football is thrown across the field an exponential function
xxTIMURxx [149]
No if it was, the football would keep going up forever and keep going up faster as it was released
physics and common sense tells us that there is air resistance to slow the rise of the football

not exponential
6 0
3 years ago
18 is the greatest common factor of two numbers. What are several things you know about the prime factorization of each number?
Aneli [31]

Answer:

uh

Step-by-step explanation:

I would use calculater math to help:))

5 0
3 years ago
Read 2 more answers
the lions won 16 games last year. this year the lions won 20 games. what is the percent increase in number of games the lions wo
jarptica [38.1K]
Last year won the lions 16 games last year and into this year the Lions won 20 games.

as the percentage increase is:

20/16

(20/4) / (16/4)

5/4
<span>
1.25 (125%)</span>
6 0
3 years ago
Carter is selling his bike. His research shows that the bike has a current value of $90, which is 45% of the amount Carter paid
GaryK [48]

Carter paid $200 for the bike.

Step-by-step explanation:

Given,

Current value of bike = $90

This represent 45% of the original amount Carter paid for bike.

Let,

x represent the original amount of bike.

45% of x = 90

\frac{45}{100}x=90\\\\0.45x=90

Dividing both sides by 0.45

\frac{0.45x}{0.45}=\frac{90}{0.45}\\x=200

Carter paid $200 for the bike.

Keywords: percentage, division

Learn more about division at:

  • brainly.com/question/899976
  • brainly.com/question/884169

#LearnwithBrainly

6 0
3 years ago
Which of the following points are more than 5 units from the point P(−2, −2)? Select all that apply. A A (2, 1) B B (4, −1) C C
netineya [11]

The distance between any 2 points P(a,b) and Q(c,d) in the coordinate plane, is given by the formula:<span>

<span> |PQ|= \sqrt{ (a-c)^{2} + (b-d)^{2}}</span></span>


Using this formula we calculate the distances |PA|, |PB|, |PC|, |PD| and |PE| and compare to 5.


|PA|= \sqrt{ (-2-2)^{2} + (-2-1)^{2}}= \sqrt{16+9}= \sqrt{25}=5

|PB|= \sqrt{ (-2-4)^{2} + (-2+1)^{2}}= \sqrt{36+1}= \sqrt{37} \approx 6

|PC|= \sqrt{ (-2-2)^{2} + (-2+3)^{2}}= \sqrt{16+1}= \sqrt{17}\approx4

|PD|= \sqrt{ (-2+6)^{2} + (-2+6)^{2}}= \sqrt{16+16}= \sqrt{32}\ \textgreater \  \sqrt{25}=5

|PE|= \sqrt{ (-2+5)^{2} + (-2-1)^{2}}= \sqrt{9+9}= \sqrt{16}=4


Answer: B and D





3 0
3 years ago
Other questions:
  • The formula s = StartRoot StartFraction S A Over 6 EndFraction EndRoot gives the length of the side, s, of a cube with a surface
    10·2 answers
  • A tipi that is shaped like a cone has a diameter of 12 ft. and a height of 15ft. What is the volume of the tipi? plese show work
    14·2 answers
  • .
    15·1 answer
  • There are 12 jurors sitting in a circle
    9·1 answer
  • 7/8 ÷1 1/2 <br><br><br><br> I am only giving out 10 points because i only have 14
    8·1 answer
  • Solving by factoring n^2+9n=-14
    7·2 answers
  • In triangle cdf, k is the centroid and dk = 16 find kh
    9·1 answer
  • Hey guys, I'm relearning some Algebra and was confused about this problem. In the equation, the problem was divided by 3. This m
    15·2 answers
  • The function shown is reflected across the y-axis to create a new function. Which is true about the domain and range of each fun
    13·1 answer
  • This is 10 points plz help ( NO LINKS ) ( ONLY ANSWER THIS IF YOU HAVE AN EXPLANATION AND IF YOU KNOW WHAT THE ANSWER IS)
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!