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
fgiga [73]
2 years ago
10

A ball is thrown downward at 4.5 m/s and accelerates at 9.8 m/s^2. What is its instantaneous velocity 2.4 s later?​

Physics
1 answer:
Alex2 years ago
8 0

Answer:

87

Explanation:

You might be interested in
Yellow-green light has a wavelength of 560 nm. What is its frequency?
Natasha2012 [34]
5.4 x 1014Hz
wavelength x frequency = the speed of light
7 0
2 years ago
Read 2 more answers
A wheel has a radius of r = 2.0 m and it rolls down a smooth incline. The height of the incline is h = 8.0 m . What is the angul
zepelin [54]

The angular velocity of the wheel at the bottom of the incline is 4.429 rad/sec

The angular velocity (ω) of an object is the rate at which the object's angle position is changing in relation to time.

For a wheel attached to an incline angle, the angular velocity can be computed by considering the conservation of energy theorem.

As such the total kinetic energy (K.E) and rotational kinetic energy (R.K.E) at a point is equal to the total potential energy (P.E) at the other point.

i.e.

P.E = K.E + R.K.E

\mathbf{mgh = \dfrac{1}{2}m(r \times \omega)^2 + \dfrac{1}{2}\times I \times \omega^2}

\mathbf{gh = \dfrac{1}{2}(r \times \omega)^2 + \dfrac{1}{2}\times r^2 \times \omega^2}

\mathbf{2 \times \dfrac{gh}{r^2} =\omega^2 +  \omega^2}

\mathbf{2 \omega^2=2 \times \dfrac{9.81 \times 8 m }{2.0 ^2}  }

\mathbf{\omega^2=\dfrac{39.24 }{2}}

\mathbf{\omega=\sqrt{19.62 } \ rad/sec}

\mathbf{\omega=4.429 \ rad/sec}

Therefore, we can conclude that the angular velocity of the wheel at the bottom of the incline is 4.429 rad/sec

Learn more about angular velocity here:

brainly.com/question/1452612

4 0
2 years ago
Read 2 more answers
Integrated Science- 8th grade science
mart [117]

Answer:

"Why"

Explanation: A scientific law is a description of how the natural world behaves under certain circumstances.

7 0
3 years ago
Read 2 more answers
A heat engine is used to convert heat into which of the following?
zimovet [89]

hoaoaoaoaoaooodndk bainxnx

7 0
2 years ago
T = mg + ma solve for a
Gnoma [55]
You said                        T           =  mg + ma

Subtract  mg 
from each side:            T - mg  =            ma

Divide each side by  m :      a  =  (T-mg) / m

                                          or  a  =  T/m  -  g
5 0
3 years ago
Other questions:
  • Building a new highway destroys habitats and can lead to soil erosion
    12·2 answers
  • What happens to the force of gravity between two masses if one mass is decreased?
    6·2 answers
  • The Earth’s internal __________ source provides the energy for our dynamic planet, providing it with the driving force for on-go
    14·2 answers
  • __ is the second most abundant element in Earth’s crust. It is found in ___, and ___; and in _ which is used to make pottery.
    13·1 answer
  • The weight of an object is the force generated by Earth's gravity accelerating the object's _________. distance mass time destin
    6·1 answer
  • A small toy cart equipped with a spring bumper rolls toward a wall with a speed of v . The cart rebounds from the wall, with the
    9·1 answer
  • The term pressure most nearly refers to which of the following?
    13·2 answers
  • Consider two thin, coaxial, coplanar, uniformly charged rings with radii a and b푏 (a
    9·1 answer
  • In the space below, explain why you agree or disagree with the first statement: Each person in a family has the same traits. The
    13·1 answer
  • A mass of 2 kg traveling at 3 m/s undergoes a one-dimensional elastic collision with a group of four 1kg masses that are at rest
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!