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
Debora [2.8K]
3 years ago
12

From the top of the engineering building, you throw a ball vertically upward. the ball strikes the ground 4.00 s later. the engi

neering building is 35.0 m tall. what is the initial velocity of the ball?

Physics
2 answers:
MariettaO [177]3 years ago
7 0
The diagram shown below illustrates the problem.
v =  vertical upward launch velocity.
g = 9.8 m/s² is acceleration due to gravity.

When s = - 35m, the elapsed time is 4 s.
Therefore
(- 35 m) = (v m/s)*(4 s) - (1/2)*(9.8 m/s²)*(4 s)²
-35 = 4v - 78.4
4v = 78.4 - 35 = 43.4
  v = 10.85 m/s

Answer: 10.85 m/s


anastassius [24]3 years ago
5 0
Equations of the vertical launch:

Vf = Vo - gt

y = yo + Vo*t - gt^2 / 2

Here yo = 35.0m
Vo is unknown
y final = 0
t = 4.00 s
and I will approximate g to 10m/s^2

=> 0 = 35.0 + Vo * 4 - 5 * (4.00)^2 => Vo = [-35 + 5*16] / 4 = - 45 / 4 = -11.25 m/s

The negative sign is due to the fact that the initial velocity is upwards and we assumed that the direction downwards was positive when used g = 10m/s^2.

Answer: 11.25 m/s


You might be interested in
Keaton is asked to solve the following physics problem:
RideAnS [48]

Answer:

The answer is C "think about the problem first, systematically consider all factors, and form a hypothesis"

Explanation:

In physics there is some basic fomula that sir Isacc Newton proposed under the topic of motion. The three formulas are below;

<em>1) v=u+at</em>

<em>2)v^2=u^2+2as</em>

<em>3)s=ut+(1/2)(at^2)</em>

the variables are explained below;

u= initial velocity of the body

a=acceleration/Speed of the body

t= time taken by the body while travelling

s= displacement of the body.

Therefore to solve keatons problem, the factors(variables) in the formulas above need to be systematically considered. Since the ball was dropped from the top of the building, the initial velocity is 0 because the body was at rest. Also the acceleration will be acceleration due to gravity (9.8m/s^2)

5 0
3 years ago
Anyone know how to do this?
Gala2k [10]

Answer:

I think, (remember think) it might be 2.0 m/s

Explanation:

If it's wrong I'm truly sorry.

6 0
3 years ago
A dog and a cat sit on a merry-go-round. The dog sits 0.3 m from the center. The cat sits 1.5 m from the center. The whole merry
pochemuha

Answer:

hope that pic helps!! let me know!!

Explanation:

or this expert answers from expert

8 0
3 years ago
what is the magnitude of g at a height above earth surface where free fall acceleration equal 6.5m/s2
ZanzabumX [31]
The magnitude of gravity is expressed in terms of its acceleration. So the magnitude of ' g ' at that altitude is exactly 6.5 m/s^2.
8 0
3 years ago
Physics Help Please!!!
liq [111]
The answer is the third graph
3 0
3 years ago
Read 2 more answers
Other questions:
  • What can be used to describe the quantitative data
    5·1 answer
  • The energy expenditure value of traveling by car is 3.6 mj/passenger-kilometer. The value for traveling by train is 1.1 mj/passe
    11·1 answer
  • Could a mixture be made up of only elements ?
    10·1 answer
  • Consider a cylinder initially filled with 9.33 10-4 m3 of ideal gas at atmospheric pressure. An external force is applied to slo
    14·1 answer
  • PLEASE HELP ASAP!!!!!!!<br> What is the measure of the gravitation force exerted on an object?
    10·1 answer
  • The work function of a material is the minimum energy required to remove an electron. Given the work function of gold is 4.90 eV
    12·1 answer
  • 1.Una partícula de masa m = 0.2 [kg] está unido a dos resortes idénticos (de longitud L = 1.2 [m]) sobre la parte superior de un
    14·1 answer
  • Need some help plsss!
    10·1 answer
  • 33. What steps can you take to minimize your risks from air pollution?
    14·1 answer
  • Please help
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!