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
nydimaria [60]
3 years ago
10

Power can be expressed

Physics
1 answer:
Komok [63]3 years ago
5 0
By definition Power is energy per second.  As units the Watt, and a Watt is joules/second (2)
You might be interested in
a 1500 kg car accelerates uniformly from rest to 10.0 meters per secound in 3.0 secound .what is the work done on the car in thi
zubka84 [21]

Answer:

The work done on the car is, W = 75,000 J

The power delivered by the engine, P = 25,000 watts

Explanation:

Given,

The mass of the car, m = 1500 Kg

The initial velocity of the car, u = 0

The final velocity of the car, v = 10 m

The time duration of the travel, t = 3 s

Using the first equation of motion

                     v = u + at

                     a = (v - u) / t

Substituting the given values in the above equation

                    a = (10 - 0) / 3

                       = 3.33 m/s²

Using the second equations of motion

                      s = ut + 1/2 at²

                         = 0 + 0.5 x 3.33 x 3²

                         = 15 m

The force exerted by the car

                         F = m x a

                            = 1500 Kg x 3.33 m/s²

                            = 5000 N

The work done by the car,

                          W = F x S

                               = 5000 N x 15 m

                               = 75,000 J

Hence, the work done on the car is, W = 75,000 J

The power delivered by the engine,

                            P = W / t

                                = 75,000 J / 3 s

                                 = 25,000 watts

The power delivered by the engine, P = 25,000 watts

5 0
3 years ago
Which does not contain a lens?
denis23 [38]
Im pretty sure it’s A eye
8 0
3 years ago
an object moving with uniform acceleration has a velocity of 12.ocm/s. if its x coordinate 2.00 later is 25.00cm what is its acc
Viktor [21]
<span> We're given that x=25 when t=2: </span>

<span>25 = 3 + 12(2) + (1/2)a(2)^2 </span>

<span>Thus a = -1 cm/sec^2</span>
4 0
3 years ago
What can you observe to know that when clear methane gas is burned it is a chemical change?
aalyn [17]
<span>4) Formation of a gas

When methane burns, it produces the gases water vapor and carbon dioxide.
</span><span />
6 0
2 years ago
What law states force is dependent on the mass and acceleration of an object
UNO [17]

Answer:

Newton's second law of motion

Explanation:

Newton's second law of motion can be stated  

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

in another form,

Force = mass * acceleration

5 0
3 years ago
Other questions:
  • A rotating space station is said to create "artificial gravity" - a loosely-defined term used for an acceleration that would be
    9·1 answer
  • A ferris wheel car with a mass of 350 kg, travels in a
    10·1 answer
  • A centripetal force of 1,400 newtons acts on a car rounding a curve with a radius of 150 meters. If the car has a mass of 2,100
    11·1 answer
  • What does lowercase r mean
    13·1 answer
  • Visible light travels at a speed 3.0 × 108 of m/s. If red light has a wavelength of 6.5 × 10–7 m, what the frequency of this lig
    7·1 answer
  • Using the law of conservation of energy, what will be the KE of an arrow having a PE of 65J after it is shot from a bow?
    6·1 answer
  • If the mass of a planet is 0.231 mE and its radius is 0.528 rE, estimate the gravitational field g at the surface of the planet.
    8·1 answer
  • The work-energy theorem states that a force acting on a particle as it moves over a ______ changes the ______ energy of the part
    11·2 answers
  • How to live a life like scientists​
    12·2 answers
  • A circuit is constructed with six resistors and two batteries as shown. The battery voltages are V1 = 18 V and V2 = 12 V. The po
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!