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
noname [10]
3 years ago
14

A girl, standing on a bridge, throws a stone vertically downward with an initial velocity of 12.0 m/s, into the river below. If

the stone hits the water 2.50 seconds later, what is the height of the bridge above the water?
Remember to identify all your data, write the equation, and show your work.
Physics
1 answer:
faltersainse [42]3 years ago
4 0

Answer: 60.65 m

Explanation

Use eqation for distance for vertical throw( down)

Vo=12m/s

t=2.5

S=Vot +gt^2/2

S=12*2.5+9.81*2.5^2/2

S=30+30.65

S=60.65m

You might be interested in
and an ideal spring of unknown force constant. The oscillator is found to have a period of 0.157 s and a maximum speed of 2 m/s
DENIUS [597]

Answer:

k = 1073.09 N/m

A = 0.05 m

Explanation:

Given:

- Time period T = 0.147 s

- maximum speed V_max = 2 m/s

- mass of the block m = 0.67 kg

Find:

- The spring constant k

- The amplitude of the motion A.

Solution:

- A general simple harmonic motion is modeled by:

                                     x (t) = A*sin(w*t)

- The velocity of the above modeled SHM is:

                                     v = dx / dt

                                     v(t) = A*w*cos(w*t)

- Where A is the amplitude in meters, w is the angular speed rad/s and time t is in seconds.

- We can see that maximum velocity occurs when (cos(w*t)) maximizes i.e it is equal to 1 or -1. Hence,

-                                      V_max = A*w

- Where w is related to mass of the object and spring constant k as follows,

                                       w = sqrt ( k / m )

- The relationship between w angular speed and Time period T is:

                                       w = 2*pi / T

- Equating the above two equations we have,

                                        m*(2*pi / T)^2 = k

- Hence,                           k = 0.67*(2*pi / 0.157)^2

                                        k = 1073.09 N / m

- So, amplitude A is:

                                        A = V_max*sqrt ( m / k )

                                        A = 2*sqrt ( 0.67 / 1073.09 )

                                        A = 0.05 m      

6 0
4 years ago
Who is gonna win the super bowl patriots or Seahawks
Oksana_A [137]

The NE Patriots will. Just you wait and see.  And when thay do, remember
that you saw the correct prediction right here on Brainly, posted by AL2006.


5 0
4 years ago
Read 2 more answers
An object is dropped from an airplane and takes 72 seconds to hit the ground. What is the magnitude of its VF Y ?
Dafna1 [17]

The final vertical velocity of the object is 705.6 m

Explanation:

Here we have to analyze the vertical motion of the object, which is a free fall motion, with constant acceleration of

g=9.8 m/s^2

towards the ground due to gravity.

Therefore, we can use the following suvat equation:

v=u+at

where

v is the final vertical velocity

u is the initial vertical velocity

a=g is the acceleration

t is the time

Since the object is dropped,

u = 0

Therefore, the magnitude of the vertical velocity of the object after t = 72 seconds is:

v=0+(9.8)(72)=705.6 m/s

Learn more about free fall:

brainly.com/question/1748290

brainly.com/question/11042118

brainly.com/question/2455974

brainly.com/question/2607086

#LearnwithBrainly

3 0
3 years ago
If the same experiment is repeated in different parts of the world by different scientists,
Misha Larkins [42]
The answer is D) The outcome of the experiment will be non observable
3 0
4 years ago
Read 2 more answers
?????????????????????????????????????*
Gelneren [198K]

Answer:

61.25N to the positive x axis

8 0
3 years ago
Other questions:
  • 15 points!!!
    13·1 answer
  • Let n represent the number of similar resistors in a circuit. Each resistor has a resistance of r. When the resistors are connec
    11·1 answer
  • A spring hangs from the ceiling. A mass of 0.50 kg is attached to the end of the spring which then oscillates with simple harmon
    9·2 answers
  • A cab driver heads south with a steady speed of V,22.0 m/s tor t 3.00 min, then makes a right turn and travels at v225.0 m/s for
    12·1 answer
  • What is peer review.why is it important​
    11·2 answers
  • Which atomic particle has no charge?<br> A. Electron<br> B. Neutron<br> C. Nucleus <br> D. Proton
    14·2 answers
  • When you push a toy car it eventually stops this is due to something called
    15·1 answer
  • Can someone help me please
    5·1 answer
  • 1. A 455 g mass, hanging at rest on a spring, stretches the spring 22.4 cm beyond its relaxed
    12·1 answer
  • When a piece of metal mass of 72.17 g is
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!