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
Sergio039 [100]
3 years ago
10

A ball which is thrown upward

Physics
2 answers:
vodka [1.7K]3 years ago
8 0

Answer:

44.27 m/s

Explanation:

Let's set the upwards direction to be positive and the downwards direction to be negative.

Since we do not know the final velocity of the ball right before it hits the ground, we will use our knowledge that the final velocity of the ball is 0 m/s right before it changes direction to fall back to the ground.

  • a = -9.8 m/s²
  • Δy = 100 ft
  • v = 0 m/s
  • v₀ = ?

Find what constant acceleration equation contains all four variables.

  • v² = v₀² + 2aΔy

Substitute the known variables into the equation and solve for v₀, the initial velocity.

  • (0)² = v₀² + 2(-9.8)(100)
  • 0 = v₀² - 1960
  • 1960 = v₀²
  • v₀ = 14√10 = 44.27188724

The initial velocity of the ball 44.27 m/s.

Alex777 [14]3 years ago
4 0

Answer:

44.27 m/s

Explanation:

Let's set the upwards direction to be positive and the downwards direction to be negative.

Since we do not know the final velocity of the ball right before it hits the ground, we will use our knowledge that the final velocity of the ball is 0 m/s right before it changes direction to fall back to the ground.

a = -9.8 m/s²

Δy = 100 ft

v = 0 m/s

v₀ = ?

Find what constant acceleration equation contains all four variables.

v² = v₀² + 2aΔy

Substitute the known variables into the equation and solve for v₀, the initial velocity.

(0)² = v₀² + 2(-9.8)(100)

0 = v₀² - 1960

1960 = v₀²

v₀ = 14√10 = 44.27188724

The initial velocity of the ball 44.27 m/s.

You might be interested in
What is the kinetic energy of a 7.26 kg bowling ball that is rolling at a speed of 2m/s
vlada-n [284]

Answer:

<h2>14.52 J</h2>

Explanation:

The kinetic energy of an object can be found by using the formula

k =  \frac{1}{2} m {v}^{2}  \\

m is the mass

v is the velocity

From the question we have

k =  \frac{1}{2}  \times 7.26 \times  {2}^{2}  \\  = 2 \times 7.26

We have the final answer as

<h3>14.52 J</h3>

Hope this helps you

4 0
3 years ago
Which of these objects would be most likely to create this sound wave?
babunello [35]

Answer: It’s C.

Explanation:

4 0
4 years ago
Read 2 more answers
if a water wave vibrates up and down 4 times each second,the distance between 2 successive crest is 5 meters, and the height fro
Mnenie [13.5K]

frequency=4Hz

wavelength=5m

amplitude=1/2×2=1m

period=1/frequency

1/4=0.25seconds.

velocity=wavelength×frequency

=5×4

=20m/s

5 0
3 years ago
Read 2 more answers
Which of these is not measured in hertz? Select all that apply.
Wittaler [7]
A). period is time

b). amplitude can be almost anything that waves . . . length, voltage, pressure, current etc.
But not hertz.

c). frequency ... "oftenness ... reciprocal time. the only item on this list that CAN be measured in Hertz.

d). wavelength ... length units
4 0
3 years ago
Read 2 more answers
PLEASE HELP ME I REALLY NEED HELP
allochka39001 [22]

Answer:

The answer is A.

Explanation:

The graph would show the unit rate otherwise known as a ratio

3 0
3 years ago
Other questions:
  • Explain the difference between a fuse and a circuit breaker. If you were designing a circuit for a reading lamp, would you inclu
    14·1 answer
  • A long, thin solenoid has 155 turns per meter and radius 1 m. The current in the solenoid is increasing at a uniform rate of 28
    8·1 answer
  • Calculate the average induced voltage between the tips of the wings of a Boeing 747 flying at 940 km/hr above East Lansing. The
    5·1 answer
  • What is the gravitational potential energy of the earth-sun system?
    15·1 answer
  • If an object is related from top of 200m high building find its velocity and time when it hits the ground.(g=(10m/s^2)
    13·1 answer
  • What do you suppose would cause an atom to lose an electron?
    6·1 answer
  • Explain what happens with the light when you see black and white opaque objects
    9·2 answers
  • 27. Describe how batteries provide electrical charges (or convert energy). (SSP5b)
    13·1 answer
  • What is the difference between the control group and the experimental group in an experimental study?
    14·1 answer
  • Drag each circle to the correct location on the image. Each circle can be used more than once, but not all circles will be used.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!