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
klemol [59]
3 years ago
15

At the same moment, one rock is dropped and one is thrown downward with an initial velocity of 29m/s from the top of a building

that is 300 m tall. How much earlier does the thrown rock strike the ground? Neglect air resistance. Please show all work and formulas used thanks
Physics
1 answer:
Inessa [10]3 years ago
6 0

Answer:

The thrown rock strike 2.42 seconds earlier.

Explanation:

This is an uniformly accelerated motion problem, so in order to find the arrival time we will use the following formula:

x=vo*t+\frac{1}{2} a*t^2\\where\\x=distance\\vo=initial velocity\\a=acceleration

So now we have an equation and unkown value.

for the thrown rock

\frac{1}{2}(9.8)*t^2+29*t-300=0

for the dropped rock

\frac{1}{2}(9.8)*t^2+0*t-300=0

solving both equation with the quadratic formula:

\frac{-b\±\sqrt{b^2-4*a*c} }{2*a}

we have:

the thrown rock arrives on t=5.4 sec

the dropped rock arrives on t=7.82 sec

so the thrown rock arrives 2.42 seconds earlier (7.82-5.4=2.42)

You might be interested in
From your results on page 29, decide whether you are able to demonstrate that the masses of the 4 different baskets differ meani
Gekata [30.6K]

Yes, it was demonstrated that the masses of the 4 different baskets differ meaningfully.

If we compare the two ranges, the differences are significant because the error range for the same basket was less than the differences between different baskets.

The Error range is a measurement of the degree of uncertainty attached to a number and is defined as the difference between the greatest and lowest error values.

So, Yes the baskets masses differ by more than the range of measurement error that was obtained by repeatedly measuring the mass of one basket.

Learn more about Experimental Errors herehttps://brainly.com/question/17648352

#SPJ4

6 0
2 years ago
Objects 1 and 2 attract each other with a electrostatic force
daser333 [38]

Electrostatic force changes like the inverse square of the distance (just like gravity).

If you double the distance, you change the force to 1/4 of what it used to be.

After the move, Objects 1 and 2 attract each other with a force of (18/16) = 1.125 units .

6 0
3 years ago
Read 2 more answers
PLEASE HELP AS SOON AS POSSIBLE!!
Naily [24]

Answer:

Saved Energy ?

Explanation:

5 0
2 years ago
Why don’t you fall through the floor
AfilCa [17]
Because it’s made out of wood
7 0
3 years ago
Read 2 more answers
A metal sphere of radius 2.0 cm carries an excess charge of 3.0 μC. What is the electric field 6.0 cm from the center of the sph
Nonamiya [84]

Answer:

The electric field is  E = 7.5 *10^{6} \ N/C

Explanation:

From the question we are told that

    The radius of the metal sphere is  R = 2.0 \ cm  =  0.02 \ m

     The excess charge which the metal sphere carries is  q =  3.0 \mu C  =  3.0*10^{-6} \ C

      The distance of the position being to the center is D = 6.0 \ cm  = 0.06 \ m

       The coulomb constant is   k =9*10^{9} \  N \cdot m^2 /C^2

Generally the electric field is mathematically represented as  

        E = \frac{k *  q}{D^2}

substituting values

        E = \frac{9*10^{9} *  30.*10^{-6}}{(0.06)^2}

      E = 7.5 *10^{6} \ N/C

5 0
3 years ago
Other questions:
  • In a shuffleboard game, the puck slides a total of 12 m on a horizontal surface before coming to rest. if the coefficient of kin
    10·1 answer
  • The symbol used for magnetic field is:
    13·1 answer
  • If the moon disappeared what effect would this have on the earths tides
    5·2 answers
  • The current in a hair dryer measures 20.0 amps. The resistance of the hair dryer is 6 ohms. What is the voltage?
    14·1 answer
  • Turner's treadmill runs with a velocity of -1.3 m/s and speeds up at regular intervals during a half-hour workout. after 25 min,
    15·2 answers
  • Sing your knowledge of chemical formulas, count the atoms of each element in HgO
    15·1 answer
  • What is genetic energy and what is potential energy
    13·2 answers
  • Help please
    15·1 answer
  • Astronomers arrange the stars into groups called spectral classes (or types) according to the kinds of lines they find in their
    15·1 answer
  • Which one of these is a compound
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!