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
Lynna [10]
3 years ago
11

If the mass of a ball B is 1 kilogram and it’s speed is 1 m/sec. the mass and the speed of ball A is three times the mass and sp

eed of ball B. What is the ratio of kinetic energy of ball A to ball B? Hint: dividethe kinetic energy equation for ball A by the kinetic energy equation of ball B.
A.3
B.6
C.9
D.27
Physics
2 answers:
vichka [17]3 years ago
5 0

your answer would be 27.

vekshin13 years ago
4 0

The ratio of kinetic energy of ball A to ball B is 27

Answer: Option D

<u>Explanation: </u>

The kinetic energy of any object is the energy exhibited by the object when it is in motion. The kinetic energy of any object is directly proportional to the mass of the object and square of the speed at which the object is moving. So the kinetic energy of any object can be represented as

                 E_{k}=\frac{1}{2} \times m \times(\text { speed })^{2}

In this case, for ball B the mass is 1 kg and speed is 1 m/s. So the kinetic energy of ball B is

            \text { Kinetic energy for ball } B=\frac{1}{2} \times 1 \times 1^{2}=0.5 J

As it is said that the mass (M) and speed of ball A is three times the mass and speed of ball B.  So ,

         \text { M of ball } A=3 \times M \text { of ball } B=3 \times 1=3 \mathrm{kg}

And,

           \text { Speed of ball } A=3 \times \text { Speed of ball } B=3 \times 1=3 \mathrm{m} / \mathrm{s}

Thus, the kinetic energy of ball A will be

            \text {Kinetic energy for ball } A=\frac{1}{2} \times 3 \times 9=13.5 \mathrm{J}

Now, to determine the ratio of kinetic energy of ball A to ball B,

\text { Ratio of kinetic energy }=\frac{\text {Kinetic energy of Ball } A}{\text {Kinetic energy of Ball } B}=\frac{13.5}{0.5} = 27

You might be interested in
True or false—If a rock is thrown into the air, the increase in the height would increase the rock’s kinetic energy, and then th
nlexa [21]
I think that this is false but I am not sure
5 0
3 years ago
How can parents help children to gain friends?
Andre45 [30]

Answer:

You could try finding a familiar peer to join the activity with your child. Or ask your child who their friends are at school, or what they look for in a friend at school.

7 0
3 years ago
Read 2 more answers
The frequency of a wave is 250hz. What is the period
antoniya [11.8K]

Answer:

Hope it helps for you :)))))

8 0
3 years ago
An isolated charged point particle produces an electric field with magnitude E at a point 2 m away. At a point 1 m from the part
guajiro [1.7K]

Explanation:

The electric field at a distance r from the charged particle is given by :

E=\dfrac{kq}{r^2}

k is electrostatic constant

if r = 2 m, electric field is given by :

E_1=\dfrac{kq}{(2)^2}\\\\=\dfrac{kq}{4}\ .....(1)

If r = 1 m, electric field is given by :

E_2=\dfrac{kq}{r_2^2}\\\\=\dfrac{kq}{1}\ ....(2)

Dividing equation (1) and (2) we get :

\dfrac{E_1}{E_2}=\dfrac{\dfrac{kq}{4}}{kq}\\\\\dfrac{E_1}{E_2}=\dfrac{1}{4}\\\\E_2=4\times E_1

So, at a point 1 m from the particle, the electric field is 4 times of the electric field at a point 2 m.

4 0
3 years ago
3 In a television tube, an electron starting from rest experiences a force of 4.0 × 10−15 N over a distance of 50 cm. The final
MAXImum [283]

Answer:

The final speed of the electron = 2.095×10⁸ m/s

Explanation:

From newton's fundamental equation of dynamics,

F = ma ........................Equation 1

Where F = force, m = mass of the electron, a = acceleration of the electron.

making a the subject of the equation,

a = F/m.................... Equation 2

Given: F = 4.0×10⁻¹⁵ N,

Constant: m =  9.109×10⁻³¹ kg.

Substituting into equation 2

a = 4.0×10⁻¹⁵/9.109×10⁻³¹

a = 4.39×10¹⁶ m/s².

Using newton's equation of motion,

v² = u²+2as .......................... Equation 3

Where v = final velocity of the electron, u = initial velocity of the electron, a = acceleration of the electron, s = distance covered by the electron.

Given: u = 0 m/s(at rest), s = 50 cm = 0.5 m, a = 4.39×10¹⁶ m/s²

Substituting into equation 3

v² = 0² + 2(0.5)(4.39×10¹⁶)

v = √(4.39×10¹⁶)

v = 2.095×10⁸ m/s

Thus the final speed of the electron = 2.095×10⁸ m/s

7 0
3 years ago
Other questions:
  • HELP PLZ HELPPPPPPPPPPPPPPPPPPPPPPP I need help
    5·1 answer
  • 1. How much energy would be required to melt 450 grams of ice at 0°C?
    12·1 answer
  • If you could observe atoms and molecules with the naked eye, what would you look for as conclusive evidence of a chemical reacti
    8·1 answer
  • A vibrating tuning fork of frequency 512 Hz is held over a water column with one end closed and the other open. As the water lev
    7·1 answer
  • A merry-go-round on a playground consists of a horizontal solid disk with a weight of 805 N and a radius of 1.47 m. A child appl
    12·1 answer
  • 5. (10 points) Which of the following statements is(are) correct: A. Resistivity purely depends on internal properties of the co
    5·1 answer
  • You want to raise the temperature of 22kg of water from 60°C to 95°C. If electricity costs $0.08/kWh, how much would it cost you
    8·1 answer
  • In a ray diagram showing refraction, the incident ray and the refracted ray...
    15·1 answer
  • If an input force of 202N is applied to the handles of the wheelbarrow in the sample problem how large is the output force that
    5·1 answer
  • What are your controls?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!