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
mylen [45]
3 years ago
9

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

ce, find the speed with which the pebble strikes the ground when the pebble is fired in the following directions. (a) horizontally m/s (b) vertically straight up m/s (c) vertically straight down m/s
Physics
1 answer:
monitta3 years ago
7 0

Answer:

The final speed is <em>30.37 m/s</em> for the three directions.

Explanation:

Given the initial speed, v₀ = 14.7 m/s and the height of the building as 36.0 m (neglecting air resistance and height of slingshot), we apply the principle of Conversation of Mechanical Energy:

E = Kinetic Energy (k.E) + Potential Energy (P.E)

K.E = 0.5mv²

P.E = mgh

∴ <em>0.5mv₀² + mgh₀ = 0.5mv₁² + mgh₁</em>

Since the final height (h₁) is zero and <em>m</em> is a common term, then we can re-write the above equation as:

<em>0.5v₀² + gh₀ = 0.5v₁² + 0</em>

<em>0.5v₁² - 0.5v₀² = gh₀</em>

<em>0.5(v₁² - v₀²) = gh₀</em>

<em>v₁² = v₀² + 2gh₀</em>

Fitting in the given terms, we can calculate the final speed

v₁² = (14.7)² + (2)(9.81)(36.0)

   = 216.09 + 706.32 = 922.41

v₁ = √922.41 = 30.37 m/s.

The speed at which the pebble hits the ground remains the same because kinetic energy depends on the speed of the object and not the direction to which the object is thrown.

You might be interested in
Equation for pressure at a depth H inside a fluid PLSS URGENTT
Blababa [14]

Answer:

We begin by solving the equation P = hρg for depth h: h=Pρg h = P ρ g . Then we take P to be 1.00 atm and ρ to be the density of the water that creates the pressure.

4 0
3 years ago
The primary purpose in creating national parks is to _____. protect the land from development and pollution provide locations fo
zzz [600]

Answer:

The primary purpose in creating national parks is to protect the land from development and pollution.

Explanation:

National parks are owned by the national government. This areas are strictly reserved for habitat of wild animals.

The main purpose for creating national parks is to reserve some space for nature. This area is protected from pollution and development.

Thus, answer for given question is protect the land from development and pollution.

4 0
3 years ago
PLEASE HELP! I'LL GIVE BRAINLEST​
DochEvi [55]

Answer:

1.62 m/s²

Explanation:

4 0
2 years ago
Compound axial member ABC has a uniform diameter of d = 1.50 in. Segment (1) is an aluminum [E1 = 10,000 ksi] alloy rod with a l
skad [1K]

Explanation:

Below is an attachment containing the solution.

5 0
3 years ago
What two gases in the atmosphere do animals and plants need to breathe and grow?
kenny6666 [7]

Answer: Explanation:

Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Point charge 3.5 μC is located at x = 0, y = 0.30 m, point charge -3.5 μC is located at x = 0 y = -0.30 m. What are (a)the magni
    10·1 answer
  • The Hall effect can be used to calculate the charge-carrier number density in a conductor. A conductor carrying current of 2.0 A
    6·1 answer
  • How does the cell membrane work to protect the cell?
    13·2 answers
  • You throw a ball downward from a window at a speed of 2.5 m/s. how fast will it be moving when it hits the sidewalk 2.1 m below?
    5·1 answer
  • The magnitude of the momentum of an object is 64 kilogram meters per second. If the magnitude of te velocity is doubled, the mag
    11·1 answer
  • Which of these has the greatest influence over how big a baby elephant will grow?
    8·1 answer
  • Which career is most concerned with the study of radioactive isotopes?
    5·1 answer
  • A 5kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N opposing the motion. Draw a fo
    10·1 answer
  • A child goes down a slide, starting from rest. If the length of the slide is 2 m and it takes the child 3 seconds to go down the
    12·1 answer
  • En un balde de 25 cm de altura se hace un orificio a 15 cm del suelo.calcula la velocidad de salida del agua​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!