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
romanna [79]
2 years ago
10

What is the kinetic energy of a 130 kg football lineman running at 6m/s?

Physics
1 answer:
Fittoniya [83]2 years ago
3 0
Kinetic energy= 1/2mv^2
=1/2*130*6^2
=2340J
You might be interested in
A 5.5-kW resistance heater in a water heater runs for 3 hours to raise the water temperature to the desired level. Determine the
Stella [2.4K]

Answer:

16.5 kwh and 59400 kJ.

Explanation:

kWh is a measure of energy that is equivalent to the power in kw times the number of hours the device worked.

In this case, it would be equal to:

E_{kwh}=5.5kw*3h=16.5kwh

1 kw also means 1kj of energy spent per second. With this, we calculate the amount of energy in kJ spent by the resistance:

E_{kJ}=5.5\frac{kJ}{s}*3h*\frac{3600s}{1h} = 59400 kJ

5 0
3 years ago
Acceleration changes and objects...
brilliants [131]

Answer:

speed and direction

Explanation:

Acceleration is the rate of change of speed and direction.

3 0
3 years ago
Use the equation for magnetic force on a moving charge to derive the equation for magnetic force on a current carrying wire. Sho
max2010maxim [7]

Answer:

The formula comes from Lorentz force law which includes both the electric and magnetic field. If the electric field is zero, the force law for just the magnetic field is <u>F=q(ν×B</u>) . Here, F  is force and is a vector because the force acts in a direction.  q  is the charge of the particle.  v  is velocity and is a vector because the particle is moving in some direction.  B is the magnetic flux density.

We can derive an expression for the magnetic force on a current by taking a sum of the magnetic forces on individual charges. (The forces add because they are in the same direction.) The force on an individual charge moving at the drift velocity vd.  Since the magnitude of B is constant at every line element of the loop (circle) and it dot product with the line element is B dl everywhere, therefore

                                                  ∮B dl=μ0 I

                                                  B ∮dl=μ0 I

                                                  B 2πr=μ0 I

                                                   B=μ02πr Id=μ0/4π I dl×rr3

Since, r can be written as r=(rcosθ,rsinθ,z) and dl as dl=(dl,0,0) And now, if we take the cross product we would get

                                               dl×r=−z dlj^+rsinθk^

and therefore the magnitude of dB is equal to

dB=μ0/4π I |dl×r|/r3=μ0/4π I z2+r2sin2θ−−−−−−−−−−√dl/r3

Thus, magnetic field is depending on r,θ,z.

Learn more about Force here-

brainly.com/question/2855467

#SPJ4

7 0
1 year ago
A car accelerates from 10 km/hr to 50 km/hr in 8 seconds. What is the acceleration?
nikklg [1K]
The answer is 5 km/hr

6 0
3 years ago
What is a force that opposes motion between two surfaces that are in contact?
choli [55]

Answer:

Friction is a force that opposes motion.

8 0
3 years ago
Other questions:
  • Plz answer this asap first answer gets brainliest and 100 points
    12·2 answers
  • how your weight would change with time if you were on a space ship traveling away from,earth toward the moon
    15·1 answer
  • (x) A change in position is called:
    13·1 answer
  • ANSWER ASAP
    10·2 answers
  • Transistor heating up in tesla coil !!!! please help me.
    7·1 answer
  • The vector quantity that defines the distance and direction between two positions.
    8·2 answers
  • What would happen when two or more capacitors are connected in series across a potential difference, then
    11·2 answers
  • How dose the circulatory systems interact with the digestive systems?
    11·1 answer
  • How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is
    6·1 answer
  • Suppose the collision between the packages is perfectly elastic. To what height does the package of mass m rebound?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!