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
REY [17]
1 year ago
15

If a 2 kg ball is traveling at 4 meters per second, what is its kinetic energy?

Physics
2 answers:
lubasha [3.4K]1 year ago
7 0

Answer:

\displaystyle KE = 32 \ J

General Formulas and Concepts:

<u>Energy</u>

Kinetic Energy Formula: \displaystyle KE = \frac{1}{2}mv^2

  • <em>KE</em> is in J
  • <em>m</em> is in kg
  • <em>v</em> is in m/s

Explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

<em>m</em> = 2 kg

<em>v</em> = 4 m/s

<u>Step 2: Find KE</u>

  1. Substitute in variables [Kinetic Energy Formula]:                                          \displaystyle KE = (2 \ kg)(4 \ m/s)^2
  2. Simplify:                                                                                                            \displaystyle KE = 32 \ J

Topic: AP Physics 1 - Algebra Based

Unit: Energy

vlada-n [284]1 year ago
5 0

Answer:

16 J

Explanation:

You might be interested in
What is the net force acting on a falling object when it reaches terminal velocity? a force equal to gravity 9.8 m/s2 two times
Leno4ka [110]

Answer:

The net force is zero

Explanation:

When an object is falling, there are two forces acting on it:

- The force of gravity, which is equal to the weight of the object, which pushes the object downwards

- The air resistance, which acts against the motion of the object, so it pulls upward

While the magnitude of the force of gravity is constant, the magnitude of the air resistance increases as the velocity of the falling object increases: at some point of the motion, the air resistance becomes equal in magnitude to the force of gravity. At this point, the net force on the object becomes zero, and according to Newton's second law, the acceleration of the object becomes also zero:

F=ma

But zero acceleration means that the velocity of the object is now constant: this is known as terminal velocity.

5 0
2 years ago
Why are ceiling of concert hall and conference halls made curved?
Gnoma [55]

The ceiling of a concert hall and conference halls are made curved so that the sound that emanates from the source will reflect to any point of the curve of these halls. Thereby, increasing the sound wave travelled across the hall.

4 0
2 years ago
Terminal velocity. A rider on a bike with the combined mass of 100kg attains a terminal speed of 15m/s on a 12% slope. Assuming
Firlakuza [10]

Answer:

0.9378

Explanation:

Weight (W) of the rider = 100 kg;

since 1 kg = 9.8067 N

100 kg will be = 980.67 N

W = 980.67 N

At the slope of 12%, the angle θ is calculated as:

tan \ \theta = \dfrac{12}{100} \\ \\  tan \ \theta = 0.12 \\ \\  \theta = tan^{-1}(0.12) \\\\ \theta = 6.84^0

The drag force D = Wsinθ

\dfrac{1}{2}C_v \rho AV^2 = W sin \theta

where;

\rho = 1.23 \ kg/m^3

A = 0.9 m²

V = 15 m/s

∴

Drag coefficient C_D = \dfrac{2 *W*sin \theta}{\rho *A *V^2}

C_D =\dfrac{2 *980.67*sin 6.84}{1.23 *0.9 *15^2}

C_D =0.9378

8 0
2 years ago
Which component of the galaxy is shown in this image? Dust
Westkost [7]

Answer:

stars

those are stars in the galaxy

3 0
1 year ago
What is the wavelength of light waves if their frequency is 5.0x1014 Hz and the speed of light 3 x
Marat540 [252]

Answer:

D. 0.60 um

Explanation:

Given the following data;

Frequency = 5.0x10^14 Hz

Speed = 3 x 10^8 m/s

To find the wavelength;

Wavelength = speed/frequency

Substituting into the equation, we have

Wavelength = 3 x 10^8/5.0x10^14

Wavelength = 6 × 10^7m

But 1 meter (m) = 1000000 micrometer (um)

6 × 10^7 meter = 0.6 micrometer.

5 0
2 years ago
Other questions:
  • What is the pair of vectors if summed , would create of equilibrium (a resultant of 0i + 0j) ?
    11·2 answers
  • Which of the following is an example of kinetic energy?
    8·1 answer
  • Potential energy due to an objects compression or extension is called _______________________ energy.
    9·1 answer
  • An airliner lands with a speed of 47.0 m/s. Each wheel of the
    15·1 answer
  • Assuming the mass of an average cell is ten times the mass of a bacterium (which is 10⁻¹⁵ kg):(a) Calculate the number of cells
    6·1 answer
  • What capacitor in series with a 100ω resistor and a 24.0 mh inductor will give a resonance frequency of 1040 hz ?
    14·1 answer
  • How does the national debt impact employment? Micro or Macro
    9·1 answer
  • PLEASE HELP: A particle contains 25 protons and 23 electrons. What type of electric charge does the particle have?
    10·2 answers
  • Two long, parallel wires each carry the same current I, but the two currents are anti-parallel. The two wires are a distance r a
    6·1 answer
  • Write the energy conversion when a moving car braking to stop completely​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!